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INCOME TAXES - Net operating loss carryforwards (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Operating loss carryforwards
Net operating loss carryforwards	$ 83,597,429	$ 64,430,676
Withholding tax credit carryforwards	1,161,221	1,106,569
Advertising expenses
Operating loss carryforwards
Net operating loss carryforwards	4,598,999	$ 4,712,189
2022
Operating loss carryforwards
Net operating loss carryforwards	7,170
2023
Operating loss carryforwards
Net operating loss carryforwards	434,585
2024
Operating loss carryforwards
Net operating loss carryforwards	4,222,851
2025
Operating loss carryforwards
Net operating loss carryforwards	9,112,742
Withholding tax credit carryforwards	984,315
2026 through 2031
Operating loss carryforwards
Net operating loss carryforwards	40,608,576
Indefinitely
Operating loss carryforwards
Net operating loss carryforwards	29,211,505
2026
Operating loss carryforwards
Withholding tax credit carryforwards	$ 176,906

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

Basis of presentation and principle of consolidation

The consolidated financial statements of the Group have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The consolidated financial statements of the Group include the financial statements of the Company, its wholly-owned subsidiaries, its VIEs and the VIEs’ subsidiaries. The Company believes that the disclosures are adequate to make the information presented not misleading.

Consolidation of a sponsored fund

The Company has a trust that develops and holds an exchange-trade fund (the “sponsored fund”) that is publicly traded from the Nasdaq Global Select Market. The fund is managed by a subsidiary of the Company. Decisions regarding the trustees of the trust and certain key activities of the sponsored fund within the trust, such as appointment of the sponsored fund’s investment adviser, resides at the trust level. As a result, shareholders of the sponsored fund lack the ability to control the key decision-making processes that most significantly affect the economic performance of the sponsored fund. Accordingly, the Company believes that the trust and the sponsored fund are variable interest entities (“VIEs”) and shall be evaluated for consolidation as VIEs.

The Company provides seed funding to new sponsored fund and may hold a significant interest in the shares of a sponsored fund during the seed investment stage when the sponsored fund’s investment track record is being established. To the extent that the Company’s interest in a sponsored fund is limited to: (i) fixed management fee and (ii) other interests that, in aggregate, would absorb an insignificant amount of variability in the fund, the Company’s management contract would not be considered a variable interest that provides the Company with the power to direct the activities of the fund and would therefore not be required to consolidate the fund. However, the Company has concluded that its fees earned from asset management arrangement with sponsored fund in which the Company holds a significant (at least 10 percent) ownership interest in the fund do represent variable interests that convey both power, in combination with the ownership interest, and significant economic exposure (both characteristics of a controlling financial interest) to the Company and therefore the Company would be the primary beneficiary that required to consolidate the fund.

Upon consolidation, management fee revenue earned on, as well as the Company’s investments in, the consolidated sponsored funds are eliminated. The Company retains the specialized accounting treatment of the sponsored fund in consolidation whereby the underlying investments are carried at fair value, reflected in financial instruments held, at fair value, in the Company's consolidated balance sheets, with corresponding changes in fair value reflected in others, net in the Company’s consolidated statements of comprehensive income (loss). The non-controlling interest represents third-party interests of the Company’s consolidated sponsored fund. This interest is redeemable at the option of the investors and therefore is recorded as mezzanine equity. Redeemable non-controlling interest is recorded at redemption value which approximates the fair value at each reporting period. When the Company no longer holds a controlling financial interest in the sponsored fund, the Company deconsolidates the sponsored fund and removes the related assets, liabilities and redeemable non-controlling interests from its balance sheet. Because consolidated sponsored funds carry their assets and liabilities at fair value, there is no incremental gain or loss recognized upon deconsolidation.

In November 2020, the sponsored fund was delisted and liquidated. Therefore it was deconsolidated in Group's consolidated financial statement since November 2020.

Use of estimates

The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported and disclosed in the consolidated financial statements and accompanying notes. Significant accounting estimates reflected in the Group’s consolidated financial statements include allowance for doubtful accounts, the useful lives of long‑lived assets, impairment of long‑lived assets and goodwill, fair value measurement of long-term equity securities without readily determinable fair value, long‑term available‑for‑sale securities, purchase price allocation for business acquisition, share‑based compensation, 2021 Series A1 note adopting the fair value option before modification (Note 9), the valuation allowance for deferred tax assets and income taxes. Actual results could differ from those estimates, and such differences may be material to the consolidated financial statements.

Fair value

Fair value is the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities required or permitted to be recorded at fair value, the Group considers the principal or most advantageous market in which it would transact and it considers assumptions that market participants would use when pricing the asset or liability.

Authoritative literature provides a fair value hierarchy which prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. The level in the hierarchy within which the fair value measurement in its entirety falls is based upon the lowest level of input that is significant to the fair value measurement as follows:

Level 1

Level 1 applies to assets or liabilities for which there are quoted prices in active markets for identical assets or liabilities.

Level 2

Level 2 applies to assets or liabilities for which there are inputs other than quoted prices included within Level 1 that are observable for the asset or liability such as quoted prices for similar assets or liabilities in active markets; quoted prices for identical assets or liabilities in markets with insufficient volume or infrequent transactions (less active markets); or model‑derived valuations in which significant inputs are observable or can be derived principally from, or corroborated by, observable market data.

Level 3

Level 3 applies to assets or liabilities for which there are unobservable inputs to the valuation methodology that are significant to the measurement of the fair value of the assets or liabilities.

Fair value of financial instruments

The Group’s financial instruments consist primarily of cash and cash equivalents, cash—segregated for regulatory purpose, term deposits, financial instruments held, at fair value, derivative assets or liabilities in relation to the Company's derivative transactions, receivables from or payables to customers, receivables from or payables to brokers, dealers, clearing organizations, amounts due from or to related parties, long‑term equity securities without readily determinable fair value, long-term available‑for‑sale securities and convertible bonds. The Company carries its financial instruments held, at fair value, long‑term available‑for‑sales securities at fair value. Financial instruments held, at fair value, based upon quoted market price, consist of stock investments related to the exchange trade funds (“ETFs”), US treasuries and corporate bonds. The carrying amounts of cash and cash equivalents, cash—segregated for regulatory purpose, term deposits, receivables from or payables to customers, receivables from or payables to brokers, dealers and clearing organizations, amounts due from or to related parties approximate their fair values due to the short‑term maturities of these instruments. The fair value of convertible bonds that adopted fair value option (2021 Series A1 Note) was measured using binomial-lattice option valuation model and significant unobservable inputs included share price, volatility, expected dividend, risk free interest rate and bond yield. The convertible bonds that are not reported at fair value are disclosed in Note 11.

Derivative financial instruments

The Company may utilize derivative financial instruments to mitigate the risk of fair value change of its investments in certain consolidated sponsored funds seeded for business development purposes. These derivative financial instruments are not designated as hedging instruments for accounting purposes. The Company does not use derivative financial instruments for speculative purposes. The Company may also acquire derivative financial instruments (i.e. warrants) during the course of its IPO distribution services. The Company records the derivative financial instruments in financial instrument held, at fair value or accrued expenses and other current liabilities on its consolidated balance sheets and measures these instruments at fair value. As of December 31, 2020 and 2021, the Company held nil and US$12,906 derivatives (mainly stock index future contracts and warrants) reflected in financial instruments held at fair value in the Company’s consolidated balance sheets, respectively. For the years ended December 31, 2020 and 2021, the Company recognized US$2,316,585 and nil realized loss, as well as nil and US$80,703 unrealized loss in other income in the Company’s consolidated statements of comprehensive income (loss), respectively.

Cash and cash equivalents

Cash and cash equivalents consist of cash on hand, demand deposits with financial institutions, term deposits with an original maturity of three months or less and highly liquid investments, which are unrestricted from withdrawal or use, or which have original maturities of three months or less when purchased.

Cash-segregated for regulatory purposes

Cash—segregated for regulatory purpose

Certain subsidiaries of the Company are obligated by rules mandated by their primary regulators to segregate or set aside amount of cash deposited by the customer and the Company. Such regulations are promulgated to protect customer assets and meet the capital adequacy and other regulatory requirement. A corresponding payable to customers is recorded upon receipt of the cash from the customer. Restricted cash represents cash and cash equivalents that are subject to withdrawal or usage restrictions. Cash segregated for regulatory purposes meets the definition of restricted cash and is included in “cash, cash equivalents and restricted cash” in the consolidated statements of cash flows.

As of December 31, 2020 and 2021, TradeUP Securities, the Company's broker-dealer subsidiary located in the USA, had a cash of US$29,625,645 and US$433,540,023 segregated for the exclusive benefit of customers under Rule 15c3-3 of the Securities Exchange Act.

Term deposits

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Term deposits

Term deposits consist of bank deposits with an original maturity of greater than three months and less than one year.

Receivables from and payables to Customers

Receivables from customers include the margin loans extended to consolidated accounts customers by the Group. Securities owned by the customers, which are not recorded in the consolidated balance sheets, are held as collateral for amounts due on the loan receivables. Receivables from customers are recorded net of allowance for doubtful accounts. Revenues earned from the margin loan transactions are included in interest income. The amounts receivable from customers that are determined by management to be uncollectible when the fair value of the collaterals fall under the carrying value of the receivables are recorded as bad debt expense in the consolidated statements of comprehensive income (loss). For the years ended December 31, 2019, 2020 and 2021, nil, US$91,788 and US$426,953 of allowance for doubtful accounts were recorded.

The table below presents the movement of allowance for doubtful accounts from customers for the year ended December 31, 2020 and 2021.

	For the years ended December 31,
	2020		2021
	US$		US$
Balance at the beginning of the year		—		91,788
Accruals		91,788		426,953
Balance at the end of the year		91,788		518,741

Payables to customers represent the closing cash balance to the customers, which include cash deposit and cash collateral received or advanced from consolidated account customers derived from security borrowing and lending activities.

The Company receives or advances cash collateral, in an amount equals to or in excess of the fair value of the securities borrowed and loaned by customers. The Company monitors the market value of securities borrowed and loaned on a daily basis, with additional collateral obtained or refunded as permitted contractually. Interest income and interest expense are recorded on an accrual basis.

Receivables from and Payables to brokers, dealers and clearing organizations

Receivables from brokers, dealers and clearing organizations include customers' cash deposits, the Group’s revenue receivables, cash collateral received for consolidated account customers’ security lending activities, and net receivables arising from unsettled trades.

Payables to brokers, dealers and clearing organizations include borrowed margin and cash collaterals received from securities borrowing transactions.

Securities borrowing transactions require the Company to deposit cash with the lender, and securities lending transactions result in the Company receiving collateral in the form of cash from the brokers, dealers and clearing organization. The cash collateral advanced to or received from the brokers are in an amount generally equal to or in excess of the market value of the securities that borrowed or loaned by the consolidated account customers. The Company monitors the market value of securities borrowed and loaned on a daily basis, with additional collateral obtained or refunded as permitted contractually. Interest income and interest expense are recorded on an accrual basis.

Property, equipment, and intangible assets, net

Property and equipment mainly consist of electronic equipment, office equipment, leasehold improvements and software. The property and equipment are carried at cost less accumulated depreciation. Depreciation is calculated on a straight‑line basis over the following estimated useful lives:

Electronic equipment		3 years
Office equipment		5-14.25 years
Software		3-5 years
Leasehold improvement		Shorter of the lease terms or the estimated useful lives of the assets

Intangible assets mainly consist of the brokerage’s license in USA, New Zealand, Hong Kong and Australia acquired by the Company, which are recognized as intangible assets with indefinite life, and it should not be amortized until its useful life is determined to be no longer indefinite. An intangible asset that is not subject to amortization is tested for impairment at least annually or if events or changes in circumstances indicate that the asset might be impaired.

Goodwill

Goodwill represents the excess of the purchase price over the fair value of identifiable net assets acquired in business combinations. Goodwill is not amortized but is tested for impairment annually or more frequently if events or changes in circumstances indicate that it might be impaired.

Goodwill is tested for impairment at the reporting unit level on an annual basis and between annual tests if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying value. These events or circumstances could include a significant change in the business climate, legal factors, operating performance indicators, competition, or sale or disposition of a significant portion of a reporting unit.

Application of the goodwill impairment test requires judgment, including the identification of reporting units, assignment of assets and liabilities to reporting units, assignment of goodwill to reporting units, and determination of the fair value of each reporting unit. The estimation of fair value of each reporting unit using a discounted cash flow methodology also requires significant judgments, including estimation of future cash flows, which is dependent on internal forecasts, estimation of the long‑term rate of growth for the Group’s business, estimation of the useful life over which cash flows will occur, and determination of the Group’s weighted average cost of capital. The estimates used to calculate the fair value of a reporting unit change from year to year based on operating results and market conditions. Changes in these estimates and assumptions could materially affect the determination of fair value and goodwill impairment for the reporting unit.

The Group first assesses relevant events and circumstances to determine whether it is necessary to perform the two-step goodwill impairment test. If, after assessing the totality of events or circumstances such as those described in the preceding paragraph, the Group determines that it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, then the first and second steps of the goodwill impairment test are unnecessary. The first step of the goodwill impairment test, used to identify potential impairment, compares the fair value of a reporting unit with its carrying amount, including goodwill. If the carrying amount of a reporting unit is greater than zero and its fair value exceeds its carrying amount, goodwill of the reporting unit is considered not impaired and the second step of the impairment test is unnecessary. If the carrying amount of a reporting unit exceeds its fair value, the second step compares the implied fair value of the affected reporting unit’s goodwill to the carrying value of that goodwill. The implied fair value of goodwill is determined in a manner similar to accounting for a business combination with the allocation of the assessed fair value determined in the first step to the assets and liabilities of the reporting unit. The excess of the fair value of the reporting unit over the amounts assigned to the assets and liabilities is the implied fair value of goodwill. This allocation process is only performed for purposes of evaluating goodwill impairment and does not result in an entry to adjust the value of any assets or liabilities. The Group concluded that the estimated fair value of the reporting unit substantially exceeded the underlying carrying value as of December 31, 2021. No impairment charge was recognized for the years ended December 31, 2019, 2020 and 2021.

Lease

The Group leases offices and other facilities in different cities in the PRC, New Zealand, Singapore, USA and other countries. The Group determines whether an arrangement constitutes a lease and records lease liabilities and right-of-use assets on its consolidated balance sheets at the lease commencement. The Group measures its lease liabilities based on the present value of the total lease payments not yet paid discounted based on the more readily determinable of the rate implicit in the lease or its incremental borrowing rate, which is the estimated rate the Group would be required to pay for a collateralized borrowing equal to the total lease payments over the term of the lease. The Group estimates its respective incremental borrowing rate for each jurisdiction based on their analysis of publicly traded debt securities of companies with credit and financial profiles similar to its own. The Group measures right-of-use assets based on the corresponding lease liability adjusted for payments made to the lessor at the commencement date, and initial direct costs it incurs under the lease. The Group begins recognizing operating lease expense when the lessor makes the underlying asset available to the Group. The Group’s leases have remaining lease terms of up to seven years, some of which include options to extend the leases for an additional period which has to be agreed with the lessors based on mutual negotiation. After considering the factors that create an economic incentive, the Group did not include renewal option periods in the lease term for which it is not reasonably certain to exercise.

For short-term leases, the Group records operating lease expense in its consolidated statements of comprehensive income (loss) on a straight-line basis over the lease term and record variable lease payments as incurred.

Long-term investment

Long‑term investment

The Group’s long‑term investments consist of equity securities without readily determinable fair values, available‑for‑sale securities and equity method investment.

(a)	Equity securities without readily determinable fair values

For investments in equity securities without readily determinable fair values, the Group elects to use the measurement alternative defined as cost, less impairment, adjusted by observable price change. The Group reviews its equity securities without readily determinable fair values investments for impairment at each reporting period by performing a qualitative assessment considering impairment indicators. The Group recorded US$755,524, nil and US$600,000 impairment loss on its equity securities without readily determinable fair values during the years ended December 31, 2019, 2020 and 2021.

(b)	Available‑for‑sale securities

For investments which are determined to be debt securities, the Group accounts for them as long‑term available‑for‑sale securities when they are not classified as either trading or held‑to‑maturity investments.

Available‑for‑sale securities are carried at its fair value and the unrealized gains or losses from the changes in fair values are included in accumulated other comprehensive income or loss.

The Group reviews its investments for other than temporary impairment based on the specific identification method. The Group considers available quantitative and qualitative evidence in evaluating potential impairment of its investments. If the cost of an investment exceeds the investment’s fair value, the Group considers, among other factors, general market conditions, government economic plans, the duration and the extent to which the fair value of the investment is less than the cost, the Group’s intent and ability to hold the investment, and the financial condition and near term prospects of the investees. The Group recorded nil, US$150,978 and nil impairment losses on its available‑for‑sale securities during the years ended December 31, 2019, 2020 and 2021, respectively.

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Long‑term investment (Continued)

(c)	Equity method investment

In accordance with ASC 323 Investment—Equity Method and Joint Ventures, the Group accounts for an equity method investment over which it has significant influence but does not own a majority of the equity interest or otherwise controls and the investments are either common stock or in substance common stock using the equity method. The Group’s share of the investee’s profit and loss is recognized in the consolidated statements comprehensive income (loss) of the period.

An impairment loss on the equity method investments is recognized in the consolidated statements of comprehensive income (loss) when the decline in value is determined to be other-than-temporary. The Group did not record any impairment losses on its equity method investment during the years ended December 31, 2019, 2020 and 2021.

Revenue recognition

Revenue from contracts with customers is recognized when or as the Group satisfies its performance obligations by transferring the promised services to the customers. A service is transferred to a customer when or as the customer obtains control of that service. A performance obligation may be satisfied at a point in time or over time. Revenue from a performance obligation satisfied at a point in time is recognized at the point in time that the Group determines the customer obtains control over the promised service. Revenue from a performance obligation satisfied over time is recognized by measuring the Group’s progress in satisfying the performance obligation in a manner that depicts the transfer of the services to the customer. The amount of revenue recognized reflects the consideration the Group expects to receive in exchange for those promised services (i.e., the “transaction price”).

The Group’s revenues from contracts with customers are recognized when the performance obligations are satisfied at an amount that reflects the consideration expected to be received in exchange for such services. The majority of the Group’s performance obligations are satisfied at a point in time upon the successful execution and clearing of the customer’s trade order. Revenue is collected from the Group’s clearing partners in the brokerage business or from the customers directly by debiting their brokerage account with the Group.

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Revenue recognition (Continued)

Nature of Services

The Group’s services under contracts with customers are mainly related to its commission earned from its online brokerage business under the consolidated accounts (which customer information are not disclosed to the broker) and the fully disclosed accounts. The Group’s main sources of revenue from contracts with customers are as follows:

Commissions earned for the Group’s online brokerage business in customers’ fully disclosed accounts and consolidated accounts are charged for each customer trade order executed and cleared by broker on a trade date basis and are reported as commissions in the consolidated statements of comprehensive income (loss).

According to the attributes of transactions under consolidated accounts, the Group provides brokerage service for its customers. Commission fees are deducted from the customer’s account at the time of trade order initiation and a pre‑determined portion is directed to the broker. The Group recognizes revenue at the time of execution of the order (i.e., trade date) on a gross basis as the Group is determined to be the primary obligor in fulfilling the trade order initiated by the customer.

According to the attributes of transactions under fully disclosed accounts, the Group provides the agreed services to its customers in facilitating the trades. Every time the broker executes and clears a trade, the broker collects the commissions, deducts its pre‑determined portion and returns the rest of the commission fees to the Group. Accordingly, the commission fee is recorded on a net basis.

ii)

Finance servicing fees are related to margin loans and securities borrowing and lending activities provided by the brokers under the fully disclosed accounts. Revenue is recognized over the period that the margin loans and securities borrowing and lending activities are outstanding.

iii)

Interest income is generated from margin loans and securities borrowing and lending activities provided to consolidated account customers and interest income from bank deposits. Interest income is recognized on an accrual basis.

iv)

Other revenues consist of the revenue arising from initial public offering (“IPO”) distribution service, currency exchange service and others. Revenue from the IPO distribution service is derived from IPO underwriting and new share subscription services in relation to IPOs in the USA and Hong Kong capital market. IPO distribution revenue are generally recognized when the services are completed. The related revenue from IPO distribution services amounted at US$3,142,763, US$13,760,209 and US$12,565,574 for the years ended December 31, 2019, 2020 and 2021. Revenue from currency exchange service is charged to the Group’s clients for providing currency exchange service, which was recorded upon the time when the services are rendered to customers. The related revenue from currency exchange service amounted at US$246,135, US$2,530,145 and US$12,607,089 for the years ended December 31, 2019, 2020 and 2021. The Group also provides promotional and advertisement service and financial advisory service under the contracts with customers, which are recorded over the period of service provided.

Contract liabilities arise when customers remit contractual cash payments in advance of the Company satisfying its performance obligations under the contract and are derecognized when the revenue associated with the contract is recognized either when a milestone is met triggering the contractual right to bill the customer or when the performance obligation is satisfied. Contract liabilities are reported in deferred income and accrued expenses and other current liabilities-advanced from customers in the consolidated balance sheets.

Research and development expenses

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Research and development expenses

Research and development expenses primarily consist of salaries and employee benefits, rental and depreciation expenses related to the development of the Group’s proprietary trading platform, back-end technology and customer relationship management system. For the years ended December 31, 2019, 2020 and 2021, US$18,033,074 and US$22,507,376 and US$47,769,773 of research and development costs have been expensed as incurred as the costs qualifying for capitalization have been insignificant.

Occupancy, Depreciation and Amortization

Occupancy expenses consist primarily of lease payments on office and data center leases and related occupancy costs, such as utilities. Depreciation and amortization expenses result from the depreciation of fixed assets, such as electronic equipment, office equipment as well as leasehold improvements and the amortization of intangible assets.

Share-based compensation

Share‑based compensation

Share‑based payment transactions with employees and managements, such as share options are measured based on the grant date fair value of the equity instrument. The Group has elected to recognize compensation expenses using the straight‑line method for all employee equity awards granted with graded vesting provided that the cumulative amount of compensation cost recognized at any date is at least equal to the portion of the grant‑date value of the options that are vested at that date, over the requisite service period of the award, which is generally the vesting period of the award. Compensation expenses for awards with performance conditions is recognized when it is probable that the performance condition will be achieved. The Group elects to recognize forfeitures when they occur. Compensation expenses for awards with service conditions is recognized on a straight-line method over the requisite service period.

The cancellation of an award accompanied by the concurrent grant of a replacement award is accounted for as a modification of the terms of the awards. The incremental compensation cost is measured as the excess of the fair value of the modified award over the fair value of the modified award at the modification date. The incremental portion of share-based compensation for the vested portion is recognized immediately and the incremental portion of share-based compensation for the unvested portion is recognized over the remaining vesting period of the award. If an award is canceled without the concurrent grant of a replacement award or any other consideration, unrecognized compensation cost related to the canceled award is recognized immediately upon cancelation.

For awards granted with a performance condition that affects vesting, the performance condition is not considered in determining the award’s grant-date fair value; however, the performance condition is considered when estimating the quantity of awards that are expected to vest. No compensation expense is recorded for awards with a performance condition unless and until the performance condition is determined to be probable of achievement.

Income taxes

Current taxes are provided for in accordance with the laws of the relevant taxing authorities. Deferred taxes are recognized when temporary differences exist between the tax basis of assets and liabilities and their reported amounts in the consolidated financial statements. Deferred tax assets and liabilities, including those for net operating loss carryforwards are measured using enacted statutory tax rates applicable to future years. Deferred tax assets are reduced by a valuation allowance if, in the opinion of management, it is more‑likely‑than‑not that some portion or all of the deferred tax assets will not be realized.

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Income taxes (Continued)

The Group accounts for uncertainty in income taxes by recording an unrecognized tax benefit resulting from tax positions taken or expected to be taken in a tax return. Tax benefits are recognized when the Group believes that it is more likely than not that the tax position will be sustained on examination by the taxing authorities based on the technical merits of the position. A tax position that meets the more likely than not recognition threshold is measured as the largest amount of tax benefit that is greater than 50 percent likely of being realized upon settlement. The Group presents interest and penalties, if any, related to an underpayment of income taxes in income tax expense.

The Group accounts for residual income tax effects in accumulated other comprehensive income due to a change in tax law or a change in judgment about realization of a valuation allowance using the portfolio method and only releases residual amounts when the entire portfolio is liquidated.

Comprehensive income or loss

Comprehensive income or loss consists of two components, net income or loss and other comprehensive income or loss, net of tax. Other comprehensive income or loss refers to revenue, expenses, and gains and losses that are recorded as an element of shareholders’ equity but are excluded from net income or loss. The Group’s other comprehensive income or loss consists of foreign currency translation adjustments from its subsidiaries not using the US$ as their functional currency and the fair value change of long‑term available‑for‑sale securities of the Group, if any. Comprehensive income or loss is reported in the consolidated statements of comprehensive income (loss).

Treasury stock

The Group accounted for those shares repurchased as treasury stock at cost, Treasury stock, and is shown separately in the shareholders’ equity as the Company has not yet decided on the ultimate disposition of those shares acquired. When the Company decides to cancel the treasury stock, the difference between the original issuance price and the repurchase price is debited into additional paid-in capital. Refer to Note 14 for details.

Non-controlling interests

Non‑controlling interests

For the Company’s consolidated subsidiaries, non‑controlling interests are recognized to reflect the portion of their equity that is not attributable, directly or indirectly, to the Company as the controlling shareholder. Non‑controlling interests are classified as a separate line item in the equity section of the Group’s consolidated balance sheets and have been separately disclosed in the Group’s consolidated statements of comprehensive income (loss) to distinguish the interests from that of the Company.

Foreign currencies

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Foreign currencies

The reporting currency of the Company is the US$. The Company and the Company’s subsidiaries with operations in the PRC, Hong Kong, New Zealand, Singapore, Australia, the United States and other jurisdictions use their respective local currencies as their functional currencies except for TBNZ which changed the functional currency from local currency to US$. The financial statements of the Company’s subsidiaries, other than the subsidiaries with functional currency in US$, are translated into US$ using the exchange rate as of the balance sheet date for assets and liabilities and the average daily exchange rate for each month for income and expense items. Translation gains and losses are recorded as a separate component of other comprehensive income or loss in the consolidated statements of change in equity (deficit) and consolidated statements of comprehensive income (loss).

In the financial statements of the Company’s subsidiaries, transactions in currencies other than the functional currency are measured and recorded in the functional currency using the exchange rate in effect at the date of the transaction. At the balance sheet date, monetary assets and liabilities that are denominated in currencies other than the functional currency are translated into the functional currency using the exchange rate at the balance sheet date. All gains and losses arising from foreign currency transactions are recorded in other income in the consolidated statements of comprehensive income (loss) during the year in which they occur.

RMB is not a freely convertible currency. The State Administration for Foreign Exchange, under the authority of the People’s Bank of China, controls the conversion of RMB into other currencies. The value of the RMB is subject to changes in central government policies and to international economic and political developments affecting supply and demand in the China Foreign Exchange Trading System market. The Group’s cash and cash equivalents denominated in RMB amounted to US$9,473,171, US$5,972,337 and US$1,606,471 as of December 31, 2019, 2020 and 2021, respectively.

Net income (loss) per share

The Group computes net income or loss per Class A and Class B ordinary share in accordance with ASC 260-10 Earnings Per Share: Overall, using the two class method. Under the two-class method, net income is allocated between ordinary shares and other participating securities based on their participating rights. Net losses are not allocated to other participating securities if based on their contractual terms they are not obligated to share in the losses.

The liquidation and dividend rights of the holders of the Company’s Class A and Class B ordinary shares are identical, except with respect to voting. As the liquidation and dividend rights are identical, the net incomes are allocated on a proportionate basis.

Basic net income or loss per share is computed by dividing net income or loss attributable to ordinary shareholders by the weighted average number of ordinary shares and contingently issuable shares outstanding during the period except that it does not include unvested restricted shares or repurchased ordinary shares subject to cancellation.

Diluted net income or loss per share is calculated by dividing net income or loss attributable to ordinary shareholders, as adjusted for the effect of dilutive potential ordinary shares, if any, by the weighted average number of ordinary shares outstanding and dilutive potential ordinary shares during the period. Potential ordinary shares are excluded in the denominator of the diluted net income or loss per share calculation if their effects would be anti-dilutive.

Concentration of credit risk

The Group’s exposure to credit risk associated with its trading and other activities is measured on an individual counterparty basis, as well as by groups of counterparties that share similar attributes. Concentrations of credit risk can be affected by changes in political, industry, or economic factors. To reduce the potential for risk concentration, credit limits are established and exposure is monitored in light of changing counterparty and market conditions. As of December 31, 2020 and 2021, the Group did not have any material concentrations of credit risk outside the ordinary course of business.

Concentration of revenue

There is no customer accounting for 10% or more of total revenues for the years ended December 31, 2019, 2020 and 2021, respectively.

Concentration of supplier

The Group relies on third parties for the execution and clearing of trade requests made by customers. In instances where these parties fail to perform their obligations, the Group may be temporarily unable to find alternative suppliers to satisfactorily deliver services to its customers in a timely manner, if at all.

For the years ended December 31, 2019, 2020 and 2021, 78.4%, 74.8% and 57.4% of its total net revenues were executed and cleared by one supplier.

Current Expected Credit Losses

On January 1, 2020, the Group adopted FASB ASC Topic 326 – “Financial Instruments – Credit Losses” (“ASC Topic 326”) which replaces the incurred loss methodology with the current expected credit loss (“CECL”) methodology. The new guidance applies to financial assets measured at amortized cost, held-to-maturity debt securities and off-balance sheet credit exposures. For on-balance sheet assets, an allowance must be recognized at the origination or purchase of in-scope assets and represents the expected credit losses over the contractual life of those assets. Expected credit losses on off-balance sheet credit exposures must be estimated over the contractual period the Group is exposed to credit risk as a result of a present obligation to extend credit.

The Group adopted ASC Topic 326 using the modified retrospective approach for all in-scope assets, which did not result in an adjustment to the opening balance in retained earnings. Results for reporting periods beginning after January 1, 2020 are presented under ASC Topic 326 while prior periods continue to be reported in accordance with previously applicable U.S. GAAP. The impact to the current period is not material since the Group’s in-scope assets are primarily subject to collateral maintenance provisions for which the Company elected to apply the practical expedient of reporting the difference between the fair value of collateral and the amortized cost for the in-scope assets as the allowance for current expected credit losses.

Acquisition

Acquisition of TradeUp Securities

In July 2019, the Group acquired 100% equity interests in TradeUP Securities for a total consideration of US$9,348,290 in a combination of US$6,348,290 of cash and US$3,000,000 of Class A ordinary shares of the Company. TradeUP Securities is a licensed U.S self-clearing broker-dealer that focuses on empowering self-directed investors with the necessary tools to manage their portfolios. TradeUP Securities brings in rich broker dealer experience in execution and clearing.

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Acquisition (Continued)

Acquisition of TradeUp Securities (Continued)

The acquisition was recorded using the acquisition method of accounting. Accordingly, the acquired assets and liabilities were recorded at their fair value at the date of acquisition. The tangible and intangible assets valuation disclosed below was based on a valuation analysis prepared by the management with the assistance from an independent third-party appraiser. In order to value the intangible asset, a multi period excess earnings method (“MPEEM”), a method of discount cash flow, was used. The MPEEM requires significant judgment and estimates by the management on future earnings as well as the economic useful life, taking into account certain factors including the appropriate discount rate. TradeUP Securities’s financial statements constituted less than 1% of revenue and 4.1% of total assets of the Company's consolidated financial statement for and as of the year ended December 31, 2019.

The purchase price was allocated at the date of acquisition as follows:

	US$			Amortization period
Cash and cash equivalents		339,611
Cash-segregated for regulatory purpose		22,094,198
Other current assets		5,098,900
Property, plant and equipment		5,581		3-5 years
Intangible assets
Operating License		6,900,000		Indefinite life
Goodwill (note 5)		2,421,403
Other current liabilities		(26,062,403	)
Deferred tax liabilities		(1,449,000	)
		9,348,290

The goodwill is mainly attributable to intangible assets that cannot be recognized separately as identifiable assets under U.S.GAAP, and comprise of (a) the assembled work force and (b) the expected but unidentifiable business growth as a result of synergy effect from the acquisition. The acquired goodwill is not deductible for tax purposes.

The Group incurred total acquisition costs of US$377,239. The acquisition costs were primarily related to legal, accounting and advisory services and were expensed as incurred for the year ended December 31, 2019 and are included in general and administrative expenses in the consolidated statements of comprehensive income (loss).

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Acquisition (Continued)

Acquisition of Ocean Joy Holdings Limited (“Ocean Joy”)

In May 2020, the Group acquired 30% equity interests in Ocean Joy, and its sole subsidiary Tiger Brokers HK, which is licensed by the SFC in Hong Kong to carry on business dealing in securities and futures contracts, for a cash consideration of US$462,276 (HK$3,600,000). The investment was accounted for as an equity method investment as the Group has significant influence but does not have control over Ocean Joy.

On October 26, 2021 (the “Acquisition Date”), the Group acquired the remaining 70% equity interest in Ocean Joy for cash consideration of US$1,079,830 (HK$8,400,000). In addition to the cash consideration, there was also US$1,426,919 (HK$11,100,000) receivables from Ocean Joy that was settled as a pre-existing relationship on acquisition. The additional 70% equity interest purchase was accounted for as a step acquisition whereby the Group remeasured the fair value of its previously held equity interests in Ocean Joy on October 26, 2021, the acquisition date. The fair value of the equity interest in Ocean Joy held by the Group immediately before the step acquisition date was US$462,784 (HK$3,600,000) and the resulting gain was US$77,593. Following the completion of the transaction, the Group held a total of 100% equity interest in Ocean Joy, and Ocean Joy became a consolidated subsidiary of the Group.

The acquisition was recorded using the acquisition method of accounting. Accordingly, the acquired assets and liabilities were recorded at their fair value at the date of acquisition. The tangible and intangible assets valuation disclosed below was based on a valuation analysis prepared by the management with the assistance from an independent third-party appraiser. In order to value the intangible asset, MPEEM, a method of discount cash flow, was used. The MPEEM requires significant judgment and estimates by the management on future earnings as well as the economic useful life, taking into account certain factors including the appropriate discount rate. The consolidated financial performance of Ocean Joy and its sole subsidiary Tiger Broker HK since the Acquisition Date to December 31, 2021 constituted less than 0.1% of revenue of the Group’s consolidated financial performance for the year ended December 31, 2021, and the total consolidated assets of Ocean Joy and its sole subsidiary Tiger Broker HK accounted for less than 2.2% of that of the Group as of December 31, 2021.

The following table summarizes the consideration for this transaction:

	US$
The fair value of its previously held equity interests in Ocean Joy at the acquisition Date		462,784
Cash Consideration		1,079,830
Settlement of pre-existing balance with Ocean Joy		1,426,919
Total consideration		2,969,533

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Acquisition (Continued)

Acquisition of Ocean Joy Holdings Limited (“Ocean Joy”) (Continued)

The assets and liabilities recognized as of the acquisition are as follows :

	US$			Amortization period
Cash and cash equivalents		3,664,133
Cash-segregated for regulatory purpose		2,166,432
Receivables-Brokers, dealers and clearing organizations		915,497
Other current assets		190,132
Property, plant and equipment		82,284		3-5 years
Deferred tax assets, net		13,060
Intangible assets
Operating License		527,060		Indefinite life
Trading rights		128,551		Indefinite life
Other non-current assets		218,537
Payable to customers		(2,884,596	)
Other payables		(2,018,511	)
Other current liabilities		(17,346	)
Deferred tax liabilities		(86,965	)
Net identifiable assets acquired		2,898,268
Add: goodwill (Note 5)		71,265
Total		2,969,533

The Group incurred total acquisition costs of US$11,736. The acquisition costs were primarily related to legal, accounting and advisory services and were expensed as incurred for the year ended December 31, 2021 and are included in general and administrative expenses in the consolidated statements of comprehensive income (loss).

The results of operations attributable to Ocean Joy are included in the consolidated statement of operations of the Group beginning on October 26, 2021, which included net revenue of US$213,895 and net loss of US$73,273 generated from the acquisition date to December 31, 2021.

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Acquisition (Continued)

Acquisition of Ocean Joy Holdings Limited (“Ocean Joy”) (Continued)

Pro forma information of acquisitions

The following unaudited pro forma information summarizes the results of operations of the Group for the years ended December 31, 2020 and 2021 assuming that the acquisition of Ocean Joy occurred as of January 1, 2020. The following pro forma financial information is not necessarily indicative of the results that would have occurred had the acquisitions been completed at the beginning of the periods as indicated, nor is it indicative of future operating results:

	For the years ended December 31,
	2020		2021
	US$		US$
	Unaudited		Unaudited
Pro forma net revenue		138,662,645		264,887,363
Pro forma net income		18,900,392		14,521,983

Recent Accounting Pronouncements

In December 2019, the FASB issued ASU 2019-12, Income taxes (Topic 740)-Simplifying the accounting for income taxes, which simplifies the accounting for income taxes by removing certain exceptions to the general principles in Topic 740, Income Taxes. For public business entities, the ASU will be effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020. For all other entities, the amendments are effective for fiscal years beginning after December 15, 2021, and interim periods within fiscal years beginning after December 15, 2022. The Group applied this ASU on January 1, 2021 and the adoption had no material impact on the Group’s consolidated financial statements.

In January 2020, the FASB issued ASU 2020-01, Investments-Equity Securities (Topic 321), Investments-Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815). ASU 2020-01 states any equity security transitioning from the alternative method of accounting under Topic 321 to the equity method, or vice versa, due to an observable transaction will be re-measured immediately before the transition. In addition, the ASU clarifies the accounting for certain non-derivative forward contracts or purchased call options to acquire equity securities stating such instruments will be measured using the fair value principles of Topic 321 before settlement or exercise. The ASU is effective for the Company for the year ended December 31, 2021 and has been applied on a prospective basis. The adoption of this ASU did not have a significant impact on the Group’s consolidated financial statements.

In March 2020, the FASB issued ASU 2020-04, Facilitation of the Effects of Reference Rate Reform on Financial Reporting, which provides optional guidance for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting if certain criteria are met. In addition, in January 2021, the FASB issued ASU 2021-01, "Reference Rate Reform (Topic 848)- Scope". The amendments in these ASUs apply to all entities that have contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. Together, these ASUs provide optional expedients and exceptions for applying GAAP to contracts, hedging relationships and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. These ASUs were effective upon issuance and may be applied prospectively through December 31, 2022. The adoption did not have a material accounting impact on the Group's consolidated financial position or results of operations.

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Recent Accounting Pronouncements (Continued)

In August 2021, the FASB issued ASU 2021-06, Presentation of Financial Statements (Topic 205), Financial Services-Depository and Lending (Topic 942), and Financial Services-Investment Companies (Topic 946): Amendments to SEC Paragraphs Pursuant to SEC Final Rule Releases No. 33-10786, Amendments to Financial Disclosures about Acquired and Disposed Businesses, and No. 33-10835, Update of Statistical Disclosures for Bank and Savings and Loan Registrants. These amendments updated certain SEC disclosure guidance that is included in the accounting standards codification to reflect the SEC’s recent issuance of rules intended to modernize and streamline disclosure requirements, including updates to business acquisition and disposition significance tests used, the significance thresholds for proforma statement disclosures, the number of preceding years of financial statements required for disclosure as well as other provisions in the SEC releases. The Group adopted this pronouncement upon issuance and the adoption had no material impact on the Group’s consolidated financial statements.

ORGANIZATION AND PRINCIPAL ACTIVITIES

12 Months Ended

Dec. 31, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

ORGANIZATION AND PRINCIPAL ACTIVITIES

1.	ORGANIZATION AND PRINCIPAL ACTIVITIES

UP Fintech Holding Limited (the “Company”) was incorporated under the laws of Cayman Islands on January 26, 2018. The Company, its subsidiaries, its consolidated variable interest entities (“VIEs”) and VIEs’ subsidiaries (collectively, the “Group”) are primarily engaged in providing online brokerage services.

As of December 31, 2021, details of the Group’s major principal operating subsidiaries, VIEs and VIEs’ subsidiaries were as follows:

	Date of incorporation or acquisition	Place of establishment/ incorporation	Percentage of legal ownership
Subsidiaries:
Tiger Brokers (NZ) Limited (“TBNZ”)	August 02, 2016	New Zealand		100	%
Up Fintech International Limited (“Up International”)	February 08, 2018	Hong Kong		100	%
Tiger Fintech (Singapore) PTE Ltd. (“Tiger SG”)	March 13, 2018	Singapore		100	%
Tiger Brokers (Singapore) PTE Ltd. (“Tiger Brokers SG”)	March 27, 2018	Singapore		100	%
US Tiger Securities, Inc. (“US Tiger Securities”)	March 30, 2018	United States of America(“USA”)		100	%
Beijing Bohu Xiangshang Technology Co., LTD (“Beijing BHXS”,“Beijing WFOE I”)	May 17, 2018	PRC		100	%
Tiger Fintech Holdings, Inc (“Tiger Fintech Holdings”)	July 09, 2018	USA		100	%
Beijing Xiangshang Yixin Technology Co., Ltd (“Beijing Yixin”,“Beijing WFOE II”)	July 26, 2018	PRC		100	%
Trading Front Inc (“Trading Front”)	August 01, 2018	USA		100	%
Wealthn LLC (“Wealthn”)	August 01, 2018	USA		100	%
Kastle Limited (“Kastle”)	October 15, 2018	Hong Kong		100	%
Tung Chi Consulting Limited (“Tung Chi”)	January 29, 2019	Hong Kong		100	%
TradeUP Securities Inc (US) (“TradeUP Securities”)¹	July 12, 2019	USA		100	%
Tradeup Inc. (“Tradeup”)	October 10, 2019	USA		100	%
Hangzhou U-Tiger Technology Co. LTD (“Hangzhou U-Tiger”)	April 09,2020	PRC		100	%
Tiger Fintech (NZ) Limited (“TFNZ”)	May 17, 2021	New Zealand		100	%
Tiger Services (AU) Pty Ltd (“Tiger Services AU”)	August 27, 2021	Australia		100	%
Tiger Brokers (HK) Global Limited (“Tiger Brokers HK”)²	October 26, 2021	Hong Kong		100	%
VIEs:
Beijing Xiangshang Rongke Technology Co. LTD (“Beijing Rongke”, “Ningxia VIE”)³	June 11, 2014	PRC	Consolidated VIE
Beijing Xiangshang Yiyi Laohu Technology Group Co., LTD (“Beijing Yiyi”, “Beijing VIE”)	October 29, 2018	PRC	Consolidated VIE
VIEs’ subsidiaries:
Tiger Technology Corporation Limited (“Tiger Technology”)	October 14, 2014	Hong Kong	VIE’s subsidiary
Beijing U-Tiger Network Technology Co., LTD (“Beijing U-Tiger Network”)	April 20, 2016	PRC	VIE’s subsidiary
Beijing U-Tiger Business Service Co., Ltd (“Beijing U-Tiger Business”)	April 21, 2016	PRC	VIE’s subsidiary
Beijing Chenhao Technology Co., LTD. (“Beijing Chenhao”)	August 11, 2016	PRC	VIE’s subsidiary
Beijing Zhijianfengyi Information Technology Co., Ltd (“Beijing ZJFY”)	January 25, 2018	PRC	VIE’s subsidiary
Shenzhen Xiang Shang Hu Xun Technology Co., LTD (“HuXun”)	June 20, 2018	PRC	VIE’s subsidiary
Beijing Huyi Technology Co., Ltd (“Huyi”)	September 05, 2018	PRC	VIE’s subsidiary
Guangzhou U-Tiger Technology Co., LTD (“Guangzhou U Tiger”)	December 24, 2018	PRC	VIE’s subsidiary

¹ In August 2021, the name of “Marsco Investment Corporation” was changed to “Tradeup Securities Inc(US)”.

² In December 2021, the name of “Ocean Joy Securities Limited” was changed to “Tiger Brokers (HK) Global Limited”.

³ In May 2021, the name of “Ningxia Xiangshang Rongke Technology Co., LTD” was changed to “Beijing Xiangshang Rongke Technology Co. LTD”.

1.	ORGANIZATION AND PRINCIPAL ACTIVITIES (Continued)

History of the Group and reorganization under identical common ownership

The Group’s history began in June 2014 with the commencement of operations of Beijing Rongke, as a limited liability company in PRC incorporated by Mr. Tianhua, Wu, Chief Executive Officer (the “CEO”). From December 2014 to January 2017, after the incorporation of the Beijing Rongke, series Angel, A, B, B+ investors (collectively, the “equity investors”) each acquired certain equity interest with preferential rights of Beijing Rongke.

In June 2018, the Company undertook a series of reorganization transactions to re-domicile its business from the PRC to the Cayman Islands (the “Re-domiciliation”). The main purpose of the Re-domiciliation was to establish a Cayman holding company for the existing business in preparation for its overseas initial public offering. At the same shareholding percentages and the rights of each shareholder were substantially the same in Beijing Rongke and the Company, the Re-domiciliation was accounted for as a reorganization of entities under common ownership. As a result, Beijing Rongke’s historical financial information was consolidated in the consolidated financial statements of the Group since the beginning of the periods presented.

The VIE arrangements

To provide the Company control over the VIEs and the rights to the expected residual returns of the VIEs and VIEs’ subsidiaries, on June 7, 2018, Beijing WFOE I, entered into a series of contractual arrangements as described below, and as amended on December 17, 2018, with the Beijing Rongke and its equity investors. On October 30, 2018, Beijing WFOE II entered into a series of substantially same contractual arrangements with Beijing Yiyi.

As a result of entering into these contractual agreements, the Company through its wholly owned subsidiaries, Beijing WFOE I and Beijing WFOE II (the “WOFEs”), has (1) power to direct the activities of the VIEs that most significantly affect the entities' economic performance and (2) the right to receive economic benefits of the VIEs that could be significant to the VIEs. Accordingly, The Company is considered the primary beneficiary of the VIEs and consolidate the VIEs’ financial results of operations, assets, and liabilities in the Company’s consolidated financial statements. The Company also believes that this ability to exercise control ensures that the VIEs will continue to execute and renew the exclusive business cooperation agreements and pay service fees to the Company. The ability to charge service fees in amounts determined at the Company’s sole discretion, and by ensuring that the exclusive business cooperation agreements are executed and renewed indefinitely, the Company has the right to receive substantially all of the economic benefits from the VIEs.

Agreements that were entered to provide the Company effective control over the VIEs

Exclusive Option Agreements. The respective equity investors of the VIEs entered into Exclusive Option Agreements with the WFOEs respectively, pursuant to which the equity investors of the VIEs grant the WFOEs an irrevocable and exclusive right to purchase or designate one or more persons to purchase the equity interests in the VIEs then held by the equity investors of the VIEs once or at multiple times at any time in part or in whole at the WFOEs’ sole and absolute discretion to the extent permitted by PRC laws. The standard equity interest purchase price is RMB10 (US$1.5). If a minimum price limited by PRC law applicable is more than RMB10 (US$1.5), the purchase price of the equity interest shall equal such minimum price. The agreement shall remain effective for a term of ten years and renewable at the WFOEs’ election.

1.	ORGANIZATION AND PRINCIPAL ACTIVITIES (Continued)

The VIE arrangements (Continued)

Powers of Attorney. The equity investors of the VIEs signed the irrevocable Powers of Attorney to appoint the WFOEs as the attorney-in-fact to act on the equity investors’ behalf on all rights that the equity investors have in respect of their equity interest in the VIEs conferred by relevant laws and regulations and the articles of association of the VIEs. The rights include but not limited to attending shareholders meeting, exercising voting rights, designating and appointing on behalf of the equity investors, the legal representative (chairperson), the director, supervisor, the chief executive officer and other senior management members of the VIEs. Powers of attorney are coupled with an interest and shall be irrevocable and continuously valid from the date of execution of the Powers of Attorney.

Spousal Consent letters. The spouse of each married equity investors of the VIEs has signed a spousal consent letter, which unconditionally and irrevocably agreed not to assert any rights over the equity interest in the VIEs held by and registered in the name of their spouse. In addition, in the event that the spouse obtains any equity interest in the VIEs for any reason, they agreed to be bound by the contractual arrangements.

Commitment letters. The respective equity investors of the VIEs entered into Commitment letters with the WFOEs respectively. The equity investors of the VIEs undertake that, when exercising their options, they will refund, without any conditions, any amount and fees to the WFOEs which exceed the share purchase price provided in the Exclusive Option Agreements.

Agreements that were entered to transfer economic benefits to the Company

Exclusive Business Cooperation Agreements. The WFOEs entered into Exclusive Business Cooperation Agreements with the VIEs and their equity investors. Under the agreements, VIEs agree to appoint the WFOEs as their exclusive services provider to provide the business support, technical and consulting services at a determined price. The WFOEs shall have exclusive and proprietary rights and interests in all rights, ownership, interests and intellectual properties arising out of or created during the performance of the agreement. The annual service fee should not be less than 99% of VIEs’ total net profit and could be decided and adjusted by the WFOEs. The service agreements shall remain effective for ten years. The WFOEs has the right to unilaterally extend the agreement and the VIEs shall accept the extended term unconditionally.

Equity Pledge Agreements. The equity investors of the VIEs entered into Equity Pledge Agreements with the WFOEs, under which the equity investors pledged all of the equity interest in the VIEs to the WFOEs to ensure that the WFOEs collect all payments due by the VIEs, including without limitation the consulting and service fees regularly from the VIEs under the Exclusive Business Cooperation Agreements. The WFOEs shall have the right to collect dividends generated by the equity interest during the term of pledge. If any event of default, the WFOEs, as the pledgee, will be entitled to take possession of the equity interest pledged and to dispose of the pledged equity interest. The Equity Pledge Agreements remain continuously valid until all payments due under the Exclusive Business Cooperation Agreements have been fulfilled by the VIEs.

Risks in relation to the VIE structure

The Company believes that the WFOEs’ contractual arrangements with the VIEs and their respective subsidiaries are in compliance with PRC laws and are legally enforceable. The equity investors of the VIEs are also major shareholders of the Company and therefore have no current interest in seeking to act contrary to the contractual arrangements. However, uncertainties in the PRC legal system could limit the Company’s ability to enforce these contractual arrangements and if the shareholders were to reduce their interest in the Company, their interests may diverge from that of the Company and that may potentially increase the risk that they would seek to act contrary to the contractual terms, for example by influencing the VIEs not to pay the service fees when required to do so.

1.	ORGANIZATION AND PRINCIPAL ACTIVITIES (Continued)

Risks in relation to the VIE structure (Continued)

The Company’s ability to control the VIEs also depends on the Powers of attorney. The WFOEs have to vote on all matters requiring shareholders’ approval in the VIEs. As noted above, the Company believes this Powers of attorney is legally enforceable but may not be as effective as direct equity ownership.

The shareholders are required to complete the registration of the equity pledge under the agreements with competent government authorities. In case any of the shareholders is in breach, the WFOEs will be entitled to certain right, including the right to dispose the pledged equity interest and to receive proceeds from the auction or sale of the pledge equity interests. The Company has completed the registration of the equity pledges relating to the VIEs with the local government authorities.

In addition, if the legal structure and contractual arrangements were found to be in violation of any existing PRC laws and regulations, the PRC regulatory authorities could:

•

revoke the Group’s business and operating licenses;

•

require the Group to discontinue or restrict its operations;

•

restrict the Group’s right to collect revenues;

•

restrict or prohibit the Group to finance its business and operations in China;

•

require the Group to restructure the operations;

•

impose additional conditions or requirements with which the Group might not be able to comply, levy fines, confiscate the Group’s income or the income of its PRC subsidiary or affiliated PRC entities; or

•

take other regulatory or enforcement actions against the Group that could be harmful to its business.

The imposition of any of these penalties could result in a material adverse effect on the Group’s ability to conduct the Group’s business. In addition, if the imposition of any of these penalties causes the Group to lose the rights to direct the activities of the VIEs, VIEs’ subsidiaries, or the right to receive their economic benefits, the Group would no longer be able to consolidate the VIEs and VIEs’ subsidiaries. The Group does not believe that any penalties imposed or actions taken by the PRC government would result in the liquidation or dissolution of the Company, the WFOEs, the VIEs and their respective subsidiaries.

1.	ORGANIZATION AND PRINCIPAL ACTIVITIES (Continued)

Risks in relation to the VIE structure (Continued)

The following table sets forth the assets, liabilities, results of operations and cash flows of the VIEs and VIEs’ subsidiaries taken as a whole, which were included in the Group’s consolidated financial statements with intercompany balances and transactions eliminated between the VIEs and VIEs’ subsidiaries:

	As of December 31,
	2020		2021
	US$		US$
Current assets		48,118,025		51,873,657
Non-current assets		16,253,660		16,083,322
Total assets		64,371,685		67,956,979
Current liabilities		25,955,828		25,422,094
Non-current liabilities		1,158,044		6,858
Total liabilities		27,113,872		25,428,952

	For the years ended December, 31
	2019		2020			2021
	US$		US$			US$
Total revenues		44,134,256		16,191,693			65,295,325
Net income (loss)		16,505,238		(7,524,524	)		(700,720	)

	For the years ended December, 31
	2019			2020			2021
	US$			US$			US$
Net cash provided by (used in) operating activities		6,567,594			(597,323	)		18,431,299
Net cash (used in) provided by investing activities		(10,240,498	)		646,647			(4,048,620	)
Net cash provided by (used in) financing activities		43,730			311,688			(5,091,778	)

Total assets as of December 31, 2020 and 2021 disclosed above include amounts due from internal companies within the Group, amounting to US$38,117,451 and US$29,039,312, respectively. Total liabilities as of December 31, 2020 and 2021 disclosed above include amounts due to the internal companies amounting to US$11,867,106 and US$8,752,699, respectively. During 2019, 2020 and 2021, the VIEs earned inter-company total revenues amounting to US$41,044,651, US$13,565,810 and US$60,971,555, respectively. All of these intercompany balances and transactions have been eliminated in consolidation.

The Group’s main revenues were mostly generated from its wholly owned subsidiaries in New Zealand, Singapore , PRC and the United States for the years ended December 31, 2019, 2020, and 2021. Most of Group’s consolidated VIEs and their subsidiaries operate business in the PRC and their main functions are to support Group’s licensed/registered entities in New Zealand, Singapore, and the United States (“Licensed Entities”). Certain of the costs generated by VIEs and their subsidiaries are covered by these Licensed Entities through inter-company transactions, and the Group expect that the Licensed Entities will cover a substantial majority of such costs in the future. In general, the holding company transfers funds from financing (including funds from its IPO, follow-on equity offerings, and offerings of convertible bonds, as applicable) to Licensed Entities in the form of capital injections or loans to support their business expansion. These Licensed Entities pay the Group’s consolidated VIEs and their subsidiaries periodically for the services rendered through inter-company transactions, pursuant to the terms of the contractual arrangements between them.

1.	ORGANIZATION AND PRINCIPAL ACTIVITIES (Continued)

Risks in relation to the VIE structure (Continued)

The Company’s subsidiaries and consolidated VIEs did not declare or distribute any dividends or distributions for the years ended December 31, 2019, 2020 and 2021. Additionally, the holding company did not declare nor distribute any dividends or distribution for the years ended December 31, 2019, 2020 and 2021.

There are no consolidated VIEs’ assets that are collateralized for the VIEs’ obligations and can only be used to settle the VIEs’ obligations. There are no creditors (or beneficial interest holders) of the VIEs that have recourse to the general credit of the Company or any of its consolidated subsidiaries. There are no terms in any arrangements, considering both explicit arrangements and implicit variable interests that require the Company or its subsidiaries to provide financial support to the VIEs. However, if the VIEs ever need financial support, the Company or its subsidiaries may, at its option and subject to statutory limits and restrictions, provide financial support to its VIEs through loans to the shareholders of the VIEs or entrustment loans to the VIEs.

Relevant PRC laws and regulations restrict the VIEs from transferring a portion of their net assets, equivalent to the balance of their statutory reserve and their share capital, to the Company in the form of loans and advances or cash dividends. Please refer to Note 21 for disclosure of restricted net assets.

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (DEFICIT) - USD ($)	Total	Ordinary shares Class A ordinary shares	Ordinary shares Class B ordinary shares	Treasury stock purchases	Preferred shares Angle preferred shares	Additional paid in capital	Statutory Reserves	Accumulated other comprehensive income (loss)	Accumulated deficit	Non controlling interests	Redeemable non-controlling interest of sponsored fund
Beginning balance at Dec. 31, 2018	$ (25,877,957)	$ 2,166	$ 3,376		$ 4,197	$ 42,520,332		$ (544,988)	$ (66,391,306)	$ (1,471,734)	$ 2,204,940
Beginning balance (in shares) at Dec. 31, 2018		216,546,541	337,611,722		419,736,104
Changes in equity
Issuance of Class A ordinary shares upon initial public offering, net of offering costs of US$3,462,099	114,765,901	$ 2,373				114,763,528
Issuance of Class A ordinary shares upon initial public offering, net of offering costs of US$3,462,099 (in shares)		237,375,000
Conversion of convertible preferred shares to Class A ordinary shares upon initial public offering	122,700,922	$ 12,295			$ (4,197)	122,692,824
Conversion of convertible preferred shares to Class A ordinary shares upon initial public offering (in shares)		1,229,518,986			(419,736,104)
Issuance of Class A ordinary shares in relation to the acquisition of TradeUp Securities Inc(US)	3,000,000	$ 85				2,999,915
Issuance of Class A ordinary shares in relation to the acquisition of TradeUp Securities Inc(US) (in shares)		8,508,390
Issuance of Class A ordinary shares upon settlement of share-based awards	201,010	$ 853				200,157
Issuance of Class A ordinary shares upon settlement of share-based awards (in shares)		85,269,532
Share-based compensation	4,062,600					4,062,600
Provision of statutory reserve							$ 724,008		(724,008)
Foreign currency translation adjustment	(321,433)							(321,433)
Acquisition of additional equity interest from non-controlling shareholders						(1,471,734)				$ 1,471,734
Investment in sponsored fund from non-controlling shareholders											239,609
Net income (loss)	(6,589,431)								(6,589,431)		639,573
Ending balance at Dec. 31, 2019	211,941,612	$ 17,772	$ 3,376			285,767,622	724,008	(866,421)	(73,704,745)		3,084,122
Ending balance (in shares) at Dec. 31, 2019		1,777,218,449	337,611,722
Changes in equity
Issuance of Class A ordinary shares upon settlement of share-based awards	5,317	$ 172				5,145
Issuance of Class A ordinary shares upon settlement of share-based awards (in shares)		17,138,985
Share-based compensation	6,054,612					6,054,612
Treasury stock purchases (in shares)				10,429,305
Treasury stock purchases	(2,172,819)			$ (2,172,819)
Provision of statutory reserve							1,939,543		(1,939,543)
Foreign currency translation adjustment	3,752,464							3,752,464
Investment in sponsored fund from non-controlling shareholders											4,251,549
Unrealized gain on available-for-sale securities	41,149							41,149
Disposal of sponsored fund from non-controlling shareholders											(10,450,123)
Net income (loss)	16,064,793								16,064,793		$ 3,114,452
Ending balance at Dec. 31, 2020	235,687,128	$ 17,944	$ 3,376	$ (2,172,819)		291,827,379	2,663,551	2,927,192	(59,579,495)
Ending balance (in shares) at Dec. 31, 2020		1,794,357,434	337,611,722	10,429,305
Changes in equity
Class B ordinary shares converted into Class A ordinary shares		$ 1,155	$ (1,155)
Class B ordinary shares converted into Class A ordinary shares (in shares)		115,500,000	(115,500,000)
Issuance of ordinary shares upon follow-on public offering	175,421,594	$ 1,121				175,420,473
Issuance of ordinary shares upon follow-on public offering (in shares)		112,125,000
Issuance of Class A ordinary shares upon settlement of share-based awards	549,984	$ 379				549,605
Issuance of Class A ordinary shares upon settlement of share-based awards (in shares)		38,004,705
Share-based compensation	13,370,377					13,370,377
Provision of statutory reserve							899,337		(899,337)
Foreign currency translation adjustment	1,839,022							1,839,022
Unrealized gain on available-for-sale securities	1,899,605							1,899,605
Equity component of convertible bonds	3,167,457					3,167,457
Net income (loss)	14,690,701								14,690,701
Ending balance at Dec. 31, 2021	$ 446,625,868	$ 20,599	$ 2,221	$ (2,172,819)		$ 484,335,291	$ 3,562,888	$ 6,665,819	$ (45,788,131)
Ending balance (in shares) at Dec. 31, 2021		2,059,987,139	222,111,722	10,429,305

LEASE

12 Months Ended

Dec. 31, 2021

Lessee Disclosure [Abstract]

Lease

17.

Lease

Operating leases

The Group’s leases consist of operating leases for corporate offices, data centers, and other facilities. The Group determines if an arrangement is a lease at inception. Some lease agreements contain lease and non-lease components, which the Group choose to account for as separate components. The allocation of the consideration between the lease and the non-lease components is based on the relative stand-alone prices of lease components included in the lease contracts. As of December 31, 2021, the Group had no long-term leases that were classified as a financing lease. As of December 31, 2021 the operating leases that have not yet commenced is immaterial. The arrangements of remaining lease terms are one year to seven years. Total lease expenses for the year ended December 31, 2020 and 2021 was US$3,494,456 and US$4,138,401, which were recorded in occupancy, depreciation and amortization on the consolidated statements of comprehensive income (loss). The Group classifies operating lease payments as cash outflows for operating activities in the statement of cash flows. The Group presents the reduction in the carrying amount of the right-of-use assets and the change in operating lease liabilities as two adjustments to net income and changes in net assets in the reconciliation of net income to net cash flows from operating activities.

The following table presents balances reported in the consolidated balance sheets related to the Group's leases:

	For the years ended December 31,
	2020		2021
	US$		US$
Operating lease right-of-use assets		7,280,763		6,613,520
Operating lease liabilities		7,207,293		5,702,954

The following table presents operating lease expenses and short-term lease expenses reported in the consolidated statements of comprehensive income (loss) related to the Group's leases:

17.	Lease (Continued)

Operating leases (Continued)

	For the years ended December 31,
	2020		2021
	US$		US$
Operating lease expenses		2,985,665		3,881,251
Short-term lease expenses		508,791		257,150

A summary of supplemental information related to operating leases as of December 31, 2021 is as follows:

	For the years ended December 31,
	2020			2021
	US$			US$
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used in operating leases		3,422,191			5,058,078
Non-cash right-of-use assets in exchange for new lease obligations:
Operating leases		4,281,660			4,058,759
Weighted average remaining lease term:
Operating leases	3 years			4 years
Weighted average discount rate:
Operating leases		5.3	%		5.5	%

The following is a maturity analysis of the annual undiscounted cash flows for the annual periods ended December 31:


	2021
	US$
Years ending December 31:
2022		2,695,299
2023		1,036,814
2024		838,969
2025		452,218
2026		465,785
2027 and after		805,931
Total undiscounted operating lease payments		6,295,016
Less: imputed interest		(592,062	)
Present value of operating lease liabilities		5,702,954

The terms of the leases do not contain contingent rents.

PREPAID EXPENSES AND OTHER CURRENT ASSETS (Tables)

12 Months Ended

Dec. 31, 2021

Prepaid Expense And Other Assets Current [Abstract]

Summary of prepaid expenses and other assets

	As of December 31,
	2020		2021
	US$		US$
IPO distribution service and promotional and advertisement service receivables		5,360,831		3,588,851
Prepaid data and IT service expenses		1,315,469		2,226,216
Prepaid income taxes		—		1,978,308
Rental and other deposits		391,625		1,885,272
Advances to employees		825,682		1,458,582
Prepaid professional service fees		998,235		1,225,020
Prepaid marketing expenses		402,724		1,073,965
Wealth management service fees receivables		—		727,209
Input VAT receivables		1,174,934		529,985
Interest receivables from term deposits		429,454		117,392
Others		315,476		1,240,823
Total		11,214,430		16,051,623

SUMMARY OF SIGNIFICANT ACCOUNTING - BUSINESS ACQUISITIONS - Pro forma information of acquisitions (Details) - Ocean Joy Holdings Limited ("Ocean Joy") - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Pro forma net revenue	$ 264,887,363	$ 138,662,645
Pro forma net income (loss)	$ 14,521,983	$ 18,900,392

SUMMARY OF SIGNIFICANT ACCOUNTING - BUSINESS ACQUISITIONS - Summary of Consideration for Transaction (Details)			1 Months Ended
	Oct. 26, 2021 USD ($)	Oct. 26, 2021 HKD ($)	May 31, 2020 USD ($)	May 31, 2020 HKD ($)	Dec. 31, 2021 USD ($)	Oct. 26, 2021 HKD ($)
Business Acquisition [Line Items]
Total consideration					$ 2,969,533
Ocean Joy Holdings Limited ("Ocean Joy")
Business Acquisition [Line Items]
The fair value of its previously held equity interests in Ocean Joy at the acquisition Date	$ 462,784
Business Combination, Consideration Transferred, Total	1,079,830	$ 8,400,000	$ 462,276	$ 3,600,000
Business combination, acquired receivable	1,426,919					$ 11,100,000
Total consideration	$ 2,969,533

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net (loss) income	$ 14,690,701	$ 19,179,245	$ (5,949,858)
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Share-based compensation	13,370,377	6,054,612	4,062,600
Depreciation and amortization	1,338,968	928,414	752,167
Unrealized fair value change of financial instruments held, at fair value	(1,081,873)	(6,281)	(1,659,469)
(Gain) loss on disposal of subsidiaries	115,681		(467,500)
Loss from equity investments, including impairments	571,440	191,603	755,524
Allowance for doubtful accounts	426,953	91,788
Loss on disposal of property and equipment	24,844	119,136	34,467
Foreign currency exchange (gain) loss	3,265,271	2,918,701	(284,153)
Deferred tax (benefit) expense	(662,310)	1,772,670	(6,215,140)
Interest expense from convertible bonds	1,294,203
Fair value change from convertible bonds	(4,194,848)
Changes in operating assets and liabilities:
Financial instruments held, at fair value	(2,258,578)	14,324,985	(6,627,630)
Receivables from customers	(292,868,761)	(266,193,537)	(101,438,442)
Receivables from brokers, dealers and clearing organizations	(82,000,320)	(602,544,944)	(183,103,763)
Amounts due from/to related parties	3,084,210	(390,683)	401,748
Prepaid expenses and other current assets	(4,350,422)	(3,531,256)	(1,259,888)
Operating lease right-of-use assets	667,243	(1,548,204)	2,251,301
Other non-current assets	(1,072,518)	(130,244)	(435,614)
Payables to customers	810,443,951	1,183,682,588	481,105,480
Payables to brokers, dealers and clearing organizations	(52,871,884)	168,580,067	55,078,762
Accrued expenses and other current liabilities	6,590,630	10,256,244	6,200,824
Operating lease liabilities	(1,504,339)	1,365,635	(2,142,202)
Deferred income	185,337	160,476	2,249,925
Net cash provided by operating activities	413,203,956	535,281,015	243,309,139
Cash flows from investing activities:
Purchase of property, equipment and intangible assets	(4,967,842)	(978,142)	(1,317,435)
Disposal of property, equipment and software	3,308
Prepayment for acquisition and long-term investments subject to certain closing conditions			(854,891)
Payment for long-term investments	(2,450,736)		(600,000)
Cash paid for acquisition, net of cash acquired	2,584,303		(6,008,680)
Cash-segregated for regulatory purpose acquired from acquisition	2,166,432		22,094,198
Repayment of loans from related parties	110,487		1,585,591
Cash received from disposal of a subsidiary	79,634		106,105
Purchase of term deposits	(17,460,305)	(31,449,568)	(65,601,207)
Maturity of term deposits	33,088,423	78,374,132	29,999,865
Advances to employees	(126,779)	(1,462,052)	(1,154,938)
Loans to related parties	(2,155,038)	(928,751)	(288,719)
Dividend received	46,938
Net cash (used in) provided by investing activities	10,918,825	43,555,619	(22,040,111)
Cash flows from financing activities:
Proceeds received from issuance of convertible bonds	154,909,777
Proceeds received from issuance of Series C convertible redeemable preferred shares			800,000
Net proceeds received from follow-on public offering (net of offering cost of US$1,215,162)	175,421,594
Net proceeds received from initial public offering (net of offering cost of US$3,462,099)			114,765,901
Proceeds received from issuance of Class A Ordinary Shares upon settlement of share-based awards	549,984	5,317	201,010
Capital contribution in sponsored fund from redeemable non-controlling interest		4,251,549	239,609
Payment to redeemable non-controlling interest due to disposal of sponsored fund		(10,450,123)
Repayment of loans to bank			(1,100,000)
Purchases of treasury stock		(2,172,819)
Net cash provided by (used in) financing activities	330,881,355	(8,366,076)	114,906,520
Increase in cash, cash equivalents and restricted cash	755,004,136	570,470,558	336,175,548
Effect of exchange rate changes	(1,718,832)	(194,554)	45,693
Cash, cash equivalents and restricted cash at beginning of the year	947,599,651	377,323,647	41,102,406
Cash, cash equivalents and restricted cash at end of the year	1,700,884,955	947,599,651	377,323,647
Cash, cash equivalents and restricted cash:
Cash and cash equivalents	269,057,708	79,652,897	59,408,555
Cash-segregated for regulatory purpose	1,431,827,247	867,946,754	317,915,092
Supplemental disclosure of cash flow information:
Income taxes paid	5,586,372	266,269	762,179
Acquisition consideration paid	$ 1,079,830		6,348,290
Non-cash investing activity:
Loan converted to long‑term investment			$ 3,846,699
Prepayment converted to long-term investment and loans to related parties		$ 654,891

REGULATORY REQUIREMENT (Tables)

12 Months Ended

Dec. 31, 2021

Regulatory Capital Requirements [Abstract]

Schedule of net capital requirement and the excess net capital for the Company's broker dealer subsidiaries

	Net Capital		Requirement		Excess Net Capital
December 31, 2021	US$		US$		US$
TradeUP Securities		95,665,200		4,283,392		91,381,808
US Tiger Securities		10,429,009		250,000		10,179,009
Tiger Brokers SG		113,290,584		12,443,882		100,846,702
Tiger Brokers HK		14,569,722		384,635		14,185,087
Total		233,954,515		17,361,909		216,592,606
	Net Capital		Requirement		Excess Net Capital
December 31, 2020	US$		US$		US$
TBNZ		61,427,613		34,258,411		27,169,202
TradeUP Securities		14,546,628		250,000		14,296,628
US Tiger Securities		9,206,613		250,000		8,956,613
Tiger Brokers SG		9,718,825		2,382,717		7,336,108
Total		94,899,679		37,141,128		57,758,551

INCOME TAXES - Income Tax Reconciliation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income (loss) before income taxes	$ 19,054,472	$ 22,029,792	$ (9,305,224)
PRC statutory tax rate	25.00%	25.00%	25.00%
Income tax at statutory income tax rate	$ 4,763,618	$ 5,507,448	$ (2,326,306)
Effect of income tax rate difference in other jurisdictions	596,978	(773,402)	124,406
Effect of preferential tax rates	(1,735,439)	1,837,667	(2,673,841)
Super deduction of research and development expense	(4,476,114)	(3,607,755)	(2,479,428)
Effect of expenses not deductible for income tax purposes	4,028,459	912,876	1,425,861
Changes in valuation allowance	1,186,269	(1,026,287)	2,573,942
Income tax expense (benefit)	$ 4,363,771	$ 2,850,547	$ (3,355,366)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2021

Restructuring Cost And Reserve [Line Items]

Schedule of allowance for doubtful accounts

The table below presents the movement of allowance for doubtful accounts from customers for the year ended December 31, 2020 and 2021.

	For the years ended December 31,
	2020		2021
	US$		US$
Balance at the beginning of the year		—		91,788
Accruals		91,788		426,953
Balance at the end of the year		91,788		518,741

Schedule of estimated useful lives of property, plant and equipment

Electronic equipment		3 years
Office equipment		5-14.25 years
Software		3-5 years
Leasehold improvement		Shorter of the lease terms or the estimated useful lives of the assets

TradeUp Securities

Restructuring Cost And Reserve [Line Items]

Schedule of allocation of purchase price as of the acquisition date

	US$			Amortization period
Cash and cash equivalents		339,611
Cash-segregated for regulatory purpose		22,094,198
Other current assets		5,098,900
Property, plant and equipment		5,581		3-5 years
Intangible assets
Operating License		6,900,000		Indefinite life
Goodwill (note 5)		2,421,403
Other current liabilities		(26,062,403	)
Deferred tax liabilities		(1,449,000	)
		9,348,290

Ocean Joy

Restructuring Cost And Reserve [Line Items]

Schedule of allocation of purchase price as of the acquisition date

The following table summarizes the consideration for this transaction:

	US$
The fair value of its previously held equity interests in Ocean Joy at the acquisition Date		462,784
Cash Consideration		1,079,830
Settlement of pre-existing balance with Ocean Joy		1,426,919
Total consideration		2,969,533

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Acquisition (Continued)

Acquisition of Ocean Joy Holdings Limited (“Ocean Joy”) (Continued)

The assets and liabilities recognized as of the acquisition are as follows :

	US$			Amortization period
Cash and cash equivalents		3,664,133
Cash-segregated for regulatory purpose		2,166,432
Receivables-Brokers, dealers and clearing organizations		915,497
Other current assets		190,132
Property, plant and equipment		82,284		3-5 years
Deferred tax assets, net		13,060
Intangible assets
Operating License		527,060		Indefinite life
Trading rights		128,551		Indefinite life
Other non-current assets		218,537
Payable to customers		(2,884,596	)
Other payables		(2,018,511	)
Other current liabilities		(17,346	)
Deferred tax liabilities		(86,965	)
Net identifiable assets acquired		2,898,268
Add: goodwill (Note 5)		71,265
Total		2,969,533

Schedule of proforma acquisition

	For the years ended December 31,
	2020		2021
	US$		US$
	Unaudited		Unaudited
Pro forma net revenue		138,662,645		264,887,363
Pro forma net income		18,900,392		14,521,983

SHARE BASED COMPENSATION - Summary of share option activities (Details) - USD ($)		12 Months Ended
	Apr. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation		$ 13,370,377	$ 6,054,612	$ 4,062,600
Share options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding at the beginning		59,744,249	95,933,244
Cancelled to grant RSUs	(7,660,000)		(7,660,000)
Exercised		(15,767,275)	(16,688,995)
Forfeited		(370,185)	(11,840,000)
Outstanding at the end		44,356,789	59,744,249	95,933,244
Granted		750,000
Outstanding at the beginning		$ 0.03005	$ 0.05223
Cancelled to grant RSUs			0.27400
Exercised		0.03322	0.00031
Forfeited		0.04544	0.09374
Outstanding at the end		0.04833	$ 0.03005	$ 0.05223
Granted		$ 1.18530
Weighted average remaining contractual life		6 years 9 months 7 days	7 years 6 months	8 years 5 months 15 days
Aggregate intrinsic value		$ 12,375,711	$ 29,829,248	$ 17,694,050
Share-based compensation	$ 800,000	4,272,939	$ 1,701,132	$ 2,239,136
Total unrecognized share based compensation expense		$ 9,455,252
Weighted average period expected to be recognized for unrecognized share based compensation expense		3 years 7 months 6 days

RELATED PARTY BALANCES AND TRANSACTIONS (Tables)

12 Months Ended

Dec. 31, 2021

Schedule of amount due from related parties

		As of December 31,
Name	Relationship with the Group	2020		2021
		US$		US$
Amounts due from related parties:
Alphalion Technology Holding Limited and its affiliates ("Alphalion Group") ⁽¹⁾	Long-term available-for-sale investee		1,032,211		1,046,190
Fast Connection Limited ⁽²⁾	Entity controlled by a principal shareholder of the Company		1,500,000		—
Ocean Joy and its subsidiary ⁽³⁾	Equity method investee		1,044,738		—
Individual directors and executive officers ⁽⁴⁾	Directors or officers of the Group		1,488,273		1,901,681
Subtotal			5,065,222		2,947,871

Receivables from brokers, dealers, and clearing organizations:
Interactive Brokers LLC ⁽⁵⁾	Under common control with a principal shareholder of the Company		761,681,403		804,639,024
Ocean Joy and its subsidiary ⁽⁶⁾	Equity method investee		2,637,529		—
Subtotal			764,318,932		804,639,024

(1)	The amount represents short-term, interest-free loans provided to Alphalion Group to facilitate its daily operational cash flow needs and prepaid IT service fee as of December 31, 2020 and 2021.

(2)

The amount represents the Group's prepaid consulting fee to Fast Connection Limited as of December 31, 2020. Because of the resignation of the director assigned by a principal shareholder of the Company which can control Fast Connection Limited in the beginning of 2021, Fast Connection Limited was no longer considered a related party in 2021.

(3)	The amounts of US$386,940(HKD3,000,000) and US$657,798(HKD5,100,000) represent short-term, interest-free loans provided to Ocean Joy and its subsidiary to facilitate their daily operational cash flow needs as of December 31, 2020. In October 2021, the Company completed the acquisition of Ocean Joy.

(4)	The Group provided brokerage services and margin loans to its individual directors and executive officers and their spouses during its ordinary courses of business. The amounts represent receivables from directors and executive officers of the Group as of December 31, 2020 and 2021 respectively.

(5)	The amount represents the Group’s customer deposit, revenue receivables and securities lending transactions from the Company's trade execution partner and principal shareholder, Interactive Brokers.

(6)	The amount represents the Group’s customer deposit and revenue receivables deposited in Tiger Brokers HK as the execution partner.

		As of December 31,
Name	Relationship with the Group	2020		2021
		US$		US$
Payables to brokers, dealers and clearing organizations-Related parties:
Interactive Brokers LLC ⁽⁷⁾	Under common control with a principal shareholder of the Company		218,563,624		170,338,199
Ocean Joy and its subsidiary ⁽⁸⁾	Equity method investee		10,496		—
Subtotal			218,574,120		170,338,199

Amount due to related parties:
Individual directors and executive officers ⁽⁹⁾	Directors or officers of the Group		—		2,039,287
Subtotal			—		2,039,287

Convertible bonds -Related parties:
Xiaomi Corporation and its affiliates ⁽¹⁰⁾	Principal shareholder of the Company		—		25,330,766
Subtotal			—		25,330,766

(7)	The amount represents the Group’s margin and cash collaterals received from securities borrowing transactions for the Company's trade execution partner and principal shareholder, Interactive Brokers.

(8)	The amount represents the Group’s service fee payables to Ocean Joy Holdings Limited and its subsidiary.

(9)	The amounts represent the cash account balance of directors and executive officers.

(10)	The amount represents the convertible bonds balance issued to Xiaomi Corporation and its affiliates.

15.	RELATED PARTY BALANCES AND TRANSACTIONS (Continued)

Transactions with related parties:

		For the years ended December 31,
Name	Relationship with the Group	2019			2020				2021
		US$			US$			US$
Xiaomi Corporation and its affiliates ⁽¹¹⁾	Principal shareholder of the Company		(517,134	)		(397,590	)		—
Alphalion Group ⁽¹²⁾	Long-term available-for-sale investee		617,500			—			(94,333	)
Fast Connection Limited ⁽¹³⁾	Entity controlled by a principal shareholder of the Company		—			(700,000	)		—
Ocean Joy and its subsidiary ⁽¹⁴⁾	Equity method investee		—			16,173			28,350
Ocean Joy and its subsidiary ⁽¹⁵⁾	Equity method investee		—			(51,446	)		(686,576	)
Interactive Brokers LLC ⁽¹⁶⁾	Under common control with a principal shareholder of the Company		38,089,982			62,704,986			73,293,370
Interactive Brokers LLC ⁽¹⁷⁾	Under common control with a principal shareholder of the Company		(2,102,385	)		(7,099,254	)		(16,823,850	)
Guangzhou 88⁽¹⁸⁾	Entity controlled by management of the Company’s subsidiary		(755,524	)		—			—
Individual directors and executive officers ⁽¹⁹⁾	Directors or officers of the Group					79,949			138,661
Xiaomi Corporation and its affiliates ⁽²⁰⁾	Principal shareholder of the Company		—			—			2,860,123
Xiaomi Corporation and its affiliates ⁽²¹⁾	Principal shareholder of the Company		—			—			(350,519	)

(11)	The amounts represent the purchase of marketing services from Xiaomi Corporation and its affiliates for the years ended December 31, 2019, 2020 and 2021, respectively.

(12)	The amounts represent the sale of a Group's subsidiary to Alphalion Group for a gain of US$617,500 in 2019 with a consideration for the sale of US$106,105 and purchase of IT services from Alphalion Group in 2021.

(13)

The amounts represent consulting fees paid to Fast Connection Limited for the years ended December 31, 2019, 2020, respectively. Because of the resignation of the director assigned by a principal shareholder of the Company which can control Fast Connection Limited in the beginning of 2021, Fast Connection Limited was no longer considered a related party in 2021.

(14)	The amounts represent the commissions and interest income earned from Tiger Brokers HK for periods from June to December of 2020 and January to October of 2021.

(15)	The amounts represent the execution and clearing fees paid to Tiger Brokers HK for periods from June to December of 2020 and January to October of 2021.

15.	RELATED PARTY BALANCES AND TRANSACTIONS (Continued)

Transactions with related parties: (Continued)

(16)	The amounts represent the commissions, financing service fees, interest income and other revenues earned from Interactive Brokers for the years ended December 31, 2019, 2020 and 2021, respectively, netting off interest expense incurred from margin, security borrowing and lending business.

(17)	The amounts represent the execution and clearing fees paid to Interactive Brokers for the years ended December 31, 2019, 2020 and 2021, respectively.

(18)

The amounts represent the Company's impairment loss on equity investment in Guangzhou 88. The Company has converted its short-term, interest-free loans provided to Guangzhou 88 into equity interests and measured at long-term equity securities without readily determinable fair value. Guangzhou 88 was a software development company that principally engaged in providing investor events information. In the year of 2019, the equity investment was fully impaired due to the operating difficulties of Guangzhou 88 which subsequently dissolved in February 2020.

(19)	The amounts represent the commissions and interest income earned by providing brokerage services and margin loans to the individual directors and executive officers during its ordinary courses of business for the years ended December 31, 2019, 2020 and 2021, respectively.

(20)	The amount represents the changes in the fair value of the convertible bonds issued to Xiaomi Corporation and its affiliates during the year (Note 9)

(21)	The amount represents the interest expense of the convertible bonds issued to Xiaomi Corporation and its affiliates accreted at an effective interest rate of 5.4% for the year ended December 31, 2021 (Note 9).

CONVERTIBLE BOND PAYABLE - Summary of Convertible Bonds Payable (Details)	12 Months Ended
	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Debt conversion amount	$ 148,841,676
2021 Series A1 Note US$ 44,000,000 1.00% due to 2026
Debt Instrument [Line Items]
Debt conversion amount	37,148,318
2021 Series A2 Note US$ 21,000,000 1.00% due to 2026
Debt Instrument [Line Items]
Debt conversion amount	21,120,487
2021 Series B Note US$ 90,000,000 1.00% due to 2026
Debt Instrument [Line Items]
Debt conversion amount	$ 90,572,871

ORGANIZATION AND PRINCIPAL ACTIVITIES - Risks in relation to the VIE structure (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Variable Interest Entity [Line Items]
Total assets	$ 3,321,418,656	$ 2,192,317,351
Total liabilities	2,874,792,788	1,956,630,223
Total revenues	264,488,162	138,496,690	$ 58,662,900
VIEs
Variable Interest Entity [Line Items]
Total assets	67,956,979	64,371,685
Total liabilities	25,428,952	27,113,872
Total revenues	65,295,325	16,191,693	44,134,256
VIEs \| Intercompany Eliminations
Variable Interest Entity [Line Items]
Total assets	29,039,312	38,117,451
Total liabilities	8,752,699	11,867,106
Total revenues	$ 60,971,555	$ 13,565,810	$ 41,044,651

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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-Subparagraph (SX 210.13-02(a)(4)(iii)(B))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756

Reference 22: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(ii))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(1))
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

+ Details

LONG-TERM INVESTMENTS

12 Months Ended

Dec. 31, 2021

Long Term Investments [Abstract]

LONG-TERM INVESTMENTS

6.	LONG‑TERM INVESTMENTS

Equity securities without readily determinable fair value

The Group had the following equity securities without readily determinable fair value:

	As of December 31,
	2020		2021
	US$		US$
TradeUP Acquisition Corp.("UPTDU")⁽^a)		—		445,400
Fortune Rise Acquisition Corporation ("FRLAU")⁽^b)		—		201,248
Shenzhen Guru Club Information Technology Group Co., LTD. ("Guru")⁽^c)		1,532,567		1,569,218
Shanghai Realize Investment Consulting Co., Ltd. ("Realize")⁽^d)		—		941,531
Shanghai Yisong Consulting Management Co., LTD ("Yisong")⁽^e)		—		407,997
UNext Group Limited ("UNext")⁽^f)		600,000		—
Total		2,132,567		3,565,394

(a)

UPTDU is a NASDAQ listed blank check company formed for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses. In February and July 2021, the Group respectively acquired 230,000 founder shares (8,500 of which was forfeited in September 2021) and 44,040 private shares issued by UPTDU for a total purchase consideration of US$445,400. After the completion of UPTDU's initial public offering in July 2021, the shares owned by the Group take up 4.54% equity interests of UPTDU with no significant impacts. The founder shares and private shares are each subject to transfer restrictions pursuant to lock-up provisions. No observable price change has been identified and no fair value change was recorded for the year ended December 31, 2021.

(b)

FRLAU is a NASDAQ listed blank check company formed for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses. In November 2021, the Group acquired 122,000 founder shares, 20,000 private shares and 60,000 representative shares issued by FRLAU for a total purchase consideration of US$201,248, which accounted for 1.57% equity interests of FRLAU with no significant impacts. The founder shares, private shares and representative shares are each subject to transfer restrictions pursuant to lock-up provisions. No observable price change has been identified and no fair value change was recorded for the year ended December 31, 2021.

(c)

In October 2017, the Group acquired 1.0% equity interests of Guru, formerly known as Tibet Gelonghui Information Technology Co., LTD., for a purchase consideration of US$1,536,972 (RMB10,000,000). Guru is principally engaged in information technology development, technical consultation and technical services. On January 1, 2018, the Group adopted ASU 2016-01 and ASU 2018-03 with no significant impacts noted. No observable price change has been identified and no fair value change was recorded for the years ended December 31, 2020 and 2021. The change of balance was foreign exchange difference.

(d)

In August 2021, the Group acquired 1.5% equity interests of Realize for a purchase consideration of US$926,183 (RMB6,000,000). Realize is principally engaged in ESOP advisory and management services. No observable price change has been identified and no fair value change was recorded for the years ended December 31, 2021. The change of balance was foreign exchange difference.

6.	LONG‑TERM INVESTMENTS (Continued)

Equity securities without readily determinable fair value (Continued)

(e)

In April 2021, the Group acquired 5% equity interests of Yisong for a purchase consideration of US$400,962 (RMB2,600,000). Yisong is principally engaged in consulting and financial advisory services. No observable price change has been identified and no fair value change was recorded for the year ended December 31, 2021. The change of balance was foreign exchange difference.

(f)

In December 2019, the Group acquired 0.6% equity interests of UNext for a purchase consideration of US$600,000. UNext is principally engaged in financing service. For the year ended December 31, 2021, due to the deterioration of the operating conditions of UNext, the Group had made full provision of US$600,000 for the impairment of this investment. .

Available‑for‑sale securities

The Group had the following available‑for‑sale securities:

	As of December 31,
	2020		2021
	US$		US$
Beijing Yingxin Network Technology Co., LTD ("Yingxin")⁽^g)		803,938		823,165
Alphalion Technology Holding Limited ("Alphalion")^(h)		3,120,113		5,019,718
Total		3,924,051		5,842,883

(g)

In September 2017, the Group acquired 2.91% equity interests of Yingxin for a purchase consideration of US$461,092 (RMB3,000,000). Yingxin is principally engaged in IT services, including systems, data or maintenance. The investment was classified as available-for-sale securities as the Group determined that the preferred shares were debt securities due to the redemption option available to the investor and measured the investment subsequently at fair value. There were no unrealized holding gains or losses recognized in other comprehensive income for the years ended December 31, 2019, 2020 and 2021. The change of balance in 2021 was foreign exchange difference.

(h)

In February 2019, the Group entered into a series of agreements to covert its short-term interest-free loans to Alphalion Technology Holding Limited and its affiliates amounted at US$3,060,113 into 25% equity interest of Alphalion (Note 15). Alphalion is principally engaged in IT services, including software maintenance, application service and data processing. The investment was classified as available-for-sale securities as the Group determined that the preferred shares were debt securities due to the redemption option available to investors and measured the investment subsequently at fair value. US$60,000 and US$1,899,605 fair value change was recorded for the years ended December 31, 2020 and 2021.

6.	LONG‑TERM INVESTMENTS (Continued)

Equity method investments:

The Group had the following Equity method investments:

	As of December 31,
	2020		2021
	US$		US$
Ocean Joy Holdings Limited ("Ocean Joy") ⁽ⁱ⁾		424,333		—
TradeUP Global Sponsor LLC ("Global Sponsor") ^(j)		—		369,567
Total		424,333		369,567

(i)

The Group prepaid US$462,276 (HK$3,600,000) in 2019 for the investment of 30% equity interests in Ocean Joy (including its sole subsidiary Tiger Brokers HK) which has a license approved by SFC in Hong Kong to provide securities and futures services. The investment was completed in May 2020. The Group acquired the remaining 70% equity interests in Ocean Joy on October 26, 2021. Prior to the acquisition, the Group accounted for the investment under the equity method. For the year ended December 31, 2020 and the period from January 1, 2021 through October 26, 2021, the Group had recorded an investment loss of US$40,625 and US$39,141, respectively. On October 26, 2021, the Group has obtained control over Ocean Joy and accounted for it as a consolidated subsidiary (Note 2).

(j)

In April 2021, the Group acquired 20% equity interests of Global Sponsor for a purchase consideration of US$454,560. Global Sponsor is the sponsor to TradeUP Global Corporation, a NASDAQ listed blank check company formed for the purpose of effecting a merger, capital stock exchange, asset acquisition, stock purchase, reorganization or similar business combination with one or more businesses. The Group accounted for the investment using equity method accounting because the Group does not control the investee but has the ability to exercise significant influence over the operating and financial policies of the investee. For the year ended December 31, 2021, the Group recorded an investment loss of US$84,993.

Lease - Operating leases (Details) - USD ($)	12 Months Ended
Lease - Operating leases (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Lessee Lease Description [Line Items]
Total operating lease expenses	$ 4,138,401	$ 3,494,456
Minimum
Lessee Lease Description [Line Items]
Remaining lease terms	1 year
Maximum
Lessee Lease Description [Line Items]
Remaining lease terms	7 years

PREPAID EXPENSES AND OTHER CURRENT ASSETS (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Prepaid Expense And Other Assets Current [Abstract]
IPO distribution service and promotional and advertisement service receivables	$ 3,588,851	$ 5,360,831
Prepaid data and IT service expenses	2,226,216	1,315,469
Prepaid income taxes	1,978,308
Rental and other deposits	1,885,272	391,625
Advances to employees	1,458,582	825,682
Prepaid professional service fees	1,225,020	998,235
Prepaid marketing expenses	1,073,965	402,724
Wealth management service fees receivables	727,209
Input VAT receivables	529,985	1,174,934
Interest receivables from term deposits	117,392	429,454
Others	1,240,823	315,476
Total	$ 16,051,623	$ 11,214,430

CONSOLIDATED BALANCE SHEETS - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Assets:
Cash and cash equivalents	$ 269,057,708	$ 79,652,897
Cash-segregated for regulatory purpose	1,431,827,247	867,946,754
Term deposits	3,044,461	18,698,143
Receivables from customers (net of allowance of US$91,788 and US$518,741 as of December 31, 2020 and 2021)	664,657,453	372,215,645
Receivables from brokers, dealers, and clearing organizations (net of allowance of nil as of December 31, 2020 and 2021):
Related parties	804,639,024	764,318,932
Others	75,143,153	32,547,428
Financial instruments held, at fair value	3,902,987	562,536
Prepaid expenses and other current assets	16,051,623	11,214,430
Amounts due from related parties	2,947,871	5,065,222
Total current assets	3,271,271,527	2,152,221,987
Right-of-use assets	6,613,520	7,280,763
Property, equipment and intangible assets, net	14,031,652	9,693,034
Goodwill	2,492,668	2,421,403
Long-term investments	9,777,844	6,480,951
Other non-current assets	4,973,085	4,299,246
Deferred tax assets	12,258,360	9,919,967
Total assets	3,321,418,656	2,192,317,351
Liabilities:
Payables to customers	2,509,492,814	1,696,164,267
Payables to brokers, dealers and clearing organizations
Related parties	170,338,199	218,574,120
Others	499,978	5,135,941
Accrued expenses and other current liabilities (including accrued expenses and other current liabilities of the consolidated VIEs without recourse to the Group of US$12,345,185 and US$15,611,533 as of December 31, 2020 and 2021, respectively)	33,746,177	27,138,201
Deferred income - current	1,213,647	844,558
Lease liabilities - current (including lease liabilities - current of the consolidated VIEs without recourse to the Group of US$1,743,537 and US$1,057,862 as of December 31,2020 and 2021, respectively)	2,610,041	3,514,592
Amount due to related parties	2,039,287
Total current liabilities	2,719,940,143	1,951,371,679
Convertible bonds
Related party	25,330,766
Others	123,510,910
Deferred income – non-current	1,382,091	1,565,843
Lease liabilities – non-current (including lease liabilities – non-current of the consolidated VIEs without recourse to the Group of US$1,158,044 and US$6,858 as of December 31, 2020 and 2021, respectively)	3,092,913	3,692,701
Deferred tax liabilities	1,535,965	0
Total liabilities	2,874,792,788	1,956,630,223
Commitments and Contingencies
Shareholders’ equity:
Additional paid-in capital	484,335,291	291,827,379
Statutory reserve	3,562,888	2,663,551
Accumulated deficit	(45,788,131)	(59,579,495)
Treasury stock (10,429,305 and 10,429,305 shares as of December 31, 2020 and 2021, respectively)	(2,172,819)	(2,172,819)
Accumulated other comprehensive income	6,665,819	2,927,192
Total UP Fintech Holding Limited shareholder’s equity	446,625,868	235,687,128
Total liabilities and equity	3,321,418,656	2,192,317,351
Class A ordinary shares
Shareholders’ equity:
Ordinary shares	20,599	17,944
Class B ordinary shares
Shareholders’ equity:
Ordinary shares	$ 2,221	$ 3,376

RELATED PARTY BALANCES AND TRANSACTIONS

12 Months Ended

Dec. 31, 2021

RELATED PARTY BALANCES AND TRANSACTIONS

15.	RELATED PARTY BALANCES AND TRANSACTIONS

		As of December 31,
Name	Relationship with the Group	2020		2021
		US$		US$
Amounts due from related parties:
Alphalion Technology Holding Limited and its affiliates ("Alphalion Group") ⁽¹⁾	Long-term available-for-sale investee		1,032,211		1,046,190
Fast Connection Limited ⁽²⁾	Entity controlled by a principal shareholder of the Company		1,500,000		—
Ocean Joy and its subsidiary ⁽³⁾	Equity method investee		1,044,738		—
Individual directors and executive officers ⁽⁴⁾	Directors or officers of the Group		1,488,273		1,901,681
Subtotal			5,065,222		2,947,871

Receivables from brokers, dealers, and clearing organizations:
Interactive Brokers LLC ⁽⁵⁾	Under common control with a principal shareholder of the Company		761,681,403		804,639,024
Ocean Joy and its subsidiary ⁽⁶⁾	Equity method investee		2,637,529		—
Subtotal			764,318,932		804,639,024

(1)	The amount represents short-term, interest-free loans provided to Alphalion Group to facilitate its daily operational cash flow needs and prepaid IT service fee as of December 31, 2020 and 2021.

(2)

(3)	The amounts of US$386,940(HKD3,000,000) and US$657,798(HKD5,100,000) represent short-term, interest-free loans provided to Ocean Joy and its subsidiary to facilitate their daily operational cash flow needs as of December 31, 2020. In October 2021, the Company completed the acquisition of Ocean Joy.

(4)	The Group provided brokerage services and margin loans to its individual directors and executive officers and their spouses during its ordinary courses of business. The amounts represent receivables from directors and executive officers of the Group as of December 31, 2020 and 2021 respectively.

(5)	The amount represents the Group’s customer deposit, revenue receivables and securities lending transactions from the Company's trade execution partner and principal shareholder, Interactive Brokers.

(6)	The amount represents the Group’s customer deposit and revenue receivables deposited in Tiger Brokers HK as the execution partner.

15.	RELATED PARTY BALANCES AND TRANSACTIONS (Continued)

		As of December 31,
Name	Relationship with the Group	2020		2021
		US$		US$
Payables to brokers, dealers and clearing organizations-Related parties:
Interactive Brokers LLC ⁽⁷⁾	Under common control with a principal shareholder of the Company		218,563,624		170,338,199
Ocean Joy and its subsidiary ⁽⁸⁾	Equity method investee		10,496		—
Subtotal			218,574,120		170,338,199

Amount due to related parties:
Individual directors and executive officers ⁽⁹⁾	Directors or officers of the Group		—		2,039,287
Subtotal			—		2,039,287

Convertible bonds -Related parties:
Xiaomi Corporation and its affiliates ⁽¹⁰⁾	Principal shareholder of the Company		—		25,330,766
Subtotal			—		25,330,766

(7)	The amount represents the Group’s margin and cash collaterals received from securities borrowing transactions for the Company's trade execution partner and principal shareholder, Interactive Brokers.

(8)	The amount represents the Group’s service fee payables to Ocean Joy Holdings Limited and its subsidiary.

(9)	The amounts represent the cash account balance of directors and executive officers.

(10)	The amount represents the convertible bonds balance issued to Xiaomi Corporation and its affiliates.

15.	RELATED PARTY BALANCES AND TRANSACTIONS (Continued)

Transactions with related parties:

		For the years ended December 31,
Name	Relationship with the Group	2019			2020				2021
		US$			US$			US$
Xiaomi Corporation and its affiliates ⁽¹¹⁾	Principal shareholder of the Company		(517,134	)		(397,590	)		—
Alphalion Group ⁽¹²⁾	Long-term available-for-sale investee		617,500			—			(94,333	)
Fast Connection Limited ⁽¹³⁾	Entity controlled by a principal shareholder of the Company		—			(700,000	)		—
Ocean Joy and its subsidiary ⁽¹⁴⁾	Equity method investee		—			16,173			28,350
Ocean Joy and its subsidiary ⁽¹⁵⁾	Equity method investee		—			(51,446	)		(686,576	)
Interactive Brokers LLC ⁽¹⁶⁾	Under common control with a principal shareholder of the Company		38,089,982			62,704,986			73,293,370
Interactive Brokers LLC ⁽¹⁷⁾	Under common control with a principal shareholder of the Company		(2,102,385	)		(7,099,254	)		(16,823,850	)
Guangzhou 88⁽¹⁸⁾	Entity controlled by management of the Company’s subsidiary		(755,524	)		—			—
Individual directors and executive officers ⁽¹⁹⁾	Directors or officers of the Group					79,949			138,661
Xiaomi Corporation and its affiliates ⁽²⁰⁾	Principal shareholder of the Company		—			—			2,860,123
Xiaomi Corporation and its affiliates ⁽²¹⁾	Principal shareholder of the Company		—			—			(350,519	)

(11)	The amounts represent the purchase of marketing services from Xiaomi Corporation and its affiliates for the years ended December 31, 2019, 2020 and 2021, respectively.

(12)	The amounts represent the sale of a Group's subsidiary to Alphalion Group for a gain of US$617,500 in 2019 with a consideration for the sale of US$106,105 and purchase of IT services from Alphalion Group in 2021.

(13)

(14)	The amounts represent the commissions and interest income earned from Tiger Brokers HK for periods from June to December of 2020 and January to October of 2021.

(15)	The amounts represent the execution and clearing fees paid to Tiger Brokers HK for periods from June to December of 2020 and January to October of 2021.

15.	RELATED PARTY BALANCES AND TRANSACTIONS (Continued)

Transactions with related parties: (Continued)

(16)	The amounts represent the commissions, financing service fees, interest income and other revenues earned from Interactive Brokers for the years ended December 31, 2019, 2020 and 2021, respectively, netting off interest expense incurred from margin, security borrowing and lending business.

(17)	The amounts represent the execution and clearing fees paid to Interactive Brokers for the years ended December 31, 2019, 2020 and 2021, respectively.

(18)

(19)	The amounts represent the commissions and interest income earned by providing brokerage services and margin loans to the individual directors and executive officers during its ordinary courses of business for the years ended December 31, 2019, 2020 and 2021, respectively.

(20)	The amount represents the changes in the fair value of the convertible bonds issued to Xiaomi Corporation and its affiliates during the year (Note 9)

(21)	The amount represents the interest expense of the convertible bonds issued to Xiaomi Corporation and its affiliates accreted at an effective interest rate of 5.4% for the year ended December 31, 2021 (Note 9).

EMPLOYEE BENEFIT PLAN

12 Months Ended

Dec. 31, 2021

Compensation And Retirement Disclosure [Abstract]

EMPLOYEE BENEFIT PLAN

20.	EMPLOYEE BENEFIT PLAN

Full time PRC employees of the Group are eligible to participate in a government‑mandated multi‑employer defined contribution plan under which certain pension benefits, medical care, unemployment insurance and employee housing fund are provided to these employees. The PRC labor regulations require the Group to accrue for these benefits based on a percentage of each employee’s salary income. Total provisions for employee benefits were US$5,618,209, US$4,323,814 and US$11,121,724 for the years ended December 31, 2019, 2020 and 2021, respectively, reported as a component of salary and compensation expenses when incurred.

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Allowance of receivables from customers	$ 518,741	$ 91,788
Allowance of receivables from brokers, dealers, and clearing organizations	0	0
Accrued expenses and other current liabilities	33,746,177	27,138,201
Lease liabilities, current	2,610,041	3,514,592
Lease liabilities, non-current	$ 3,092,913	$ 3,692,701
Treasury Stock, shares	10,429,305	10,429,305
Class A ordinary shares
Common stock, par value (in US dollars per share)	$ 0.00001
Common stock, shares authorized (in shares)	4,662,388,278	4,662,388,278
Common stock, shares issued (in shares)	2,059,987,139	1,794,357,434
Common stock, shares outstanding (in shares)	2,059,987,139	1,794,357,434
Class B ordinary shares
Common stock, par value (in US dollars per share)	$ 0.00001
Common stock, shares authorized (in shares)	337,611,722	337,611,722
Common stock, shares issued (in shares)	222,111,722	337,611,722
Common stock, shares outstanding (in shares)	222,111,722	337,611,722
VIEs
Accrued expenses and other current liabilities	$ 15,611,533	$ 12,345,185
Lease liabilities, current	1,057,862	1,743,537
Lease liabilities, non-current	$ 6,858	$ 1,158,044

ORGANIZATION AND PRINCIPAL ACTIVITIES - Subsidiaries (Details)	Dec. 31, 2021
TBNZ
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items]
Legal ownership (as a percent)	100.00%
Up International
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items]
Legal ownership (as a percent)	100.00%
Tiger SG
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items]
Legal ownership (as a percent)	100.00%
Tiger Brokers SG
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items]
Legal ownership (as a percent)	100.00%
US Tiger Securities
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items]
Legal ownership (as a percent)	100.00%
Beijing BHXS, Beijing WFOE
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items]
Legal ownership (as a percent)	100.00%
Tiger Fintech Holdings
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items]
Legal ownership (as a percent)	100.00%
Beijing Yixin, Beijing WFOE
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items]
Legal ownership (as a percent)	100.00%
Trading Front
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items]
Legal ownership (as a percent)	100.00%
Wealthn
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items]
Legal ownership (as a percent)	100.00%
Kastle
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items]
Legal ownership (as a percent)	100.00%
Tung Chi
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items]
Legal ownership (as a percent)	100.00%
TradeUp Securities
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items]
Legal ownership (as a percent)	100.00%
Tradeup
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items]
Legal ownership (as a percent)	100.00%
Hangzhou U-Tiger
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items]
Legal ownership (as a percent)	100.00%
TFNZ
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items]
Legal ownership (as a percent)	100.00%
Tiger Services AU
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items]
Legal ownership (as a percent)	100.00%
Tiger Brokers HK
Consolidation Less Than Wholly Owned Subsidiary Parent Ownership Interest Effects Of Changes Net [Line Items]
Legal ownership (as a percent)	100.00%

RELATED PARTY BALANCES AND TRANSACTIONS (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
RELATED PARTY BALANCES AND TRANSACTIONS
Amounts due from related parties	$ 2,947,871	$ 5,065,222
Receivables from brokers, dealers, and clearing organizations
RELATED PARTY BALANCES AND TRANSACTIONS
Amounts due from related parties	804,639,024	764,318,932
Interactive Brokers
RELATED PARTY BALANCES AND TRANSACTIONS
Amounts due from related parties	804,639,024	761,681,403
Ocean Joy and its subsidiary
RELATED PARTY BALANCES AND TRANSACTIONS
Amounts due from related parties		2,637,529
Alphalion Group Limited
RELATED PARTY BALANCES AND TRANSACTIONS
Amounts due from related parties	1,046,190	1,032,211
Fast Connection Limited
RELATED PARTY BALANCES AND TRANSACTIONS
Amounts due from related parties		1,500,000
Ocean Joy and its subsidiary
RELATED PARTY BALANCES AND TRANSACTIONS
Amounts due from related parties		1,044,738
Amount due to related parties		10,496
Individual directors and executive officers
RELATED PARTY BALANCES AND TRANSACTIONS
Amounts due from related parties	1,901,681	1,488,273
Amount due to related parties	2,039,287
Interactive Brokers
RELATED PARTY BALANCES AND TRANSACTIONS
Amount due to related parties	170,338,199	218,563,624
Payables to brokers, dealers and clearing organizations
RELATED PARTY BALANCES AND TRANSACTIONS
Amount due to related parties	170,338,199	$ 218,574,120
Xiaomi Corporation and its affiliates
RELATED PARTY BALANCES AND TRANSACTIONS
Amount due to related parties	$ 25,330,766

LONG TERM INVESTMENTS - Equity method investments (Details)	1 Months Ended	10 Months Ended	12 Months Ended
	Apr. 30, 2021 USD ($)	Oct. 26, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	May 31, 2020 USD ($)	May 31, 2020 HKD ($)
Schedule Of Equity Method Investments [Line Items]
Equity method investments			$ 369,567	$ 424,333
Payment for longterm investments			2,450,736		$ 600,000
Ocean Joy Holdings Limited ("Ocean Joy")
Schedule Of Equity Method Investments [Line Items]
Equity method investments				424,333
Investment amount						$ 462,276	$ 3,600,000
Percentage of ownership investment		70.00%				30.00%	30.00%
Investment gain (loss)		$ (39,141)		$ (40,625)
TradeUP Global Sponsor LLC ("Global Sponsor")
Schedule Of Equity Method Investments [Line Items]
Equity method investments			369,567
Percentage of ownership investment	20.00%
Investment gain (loss)			$ (84,993)
Payment for longterm investments	$ 454,560

PROPERTY, EQUIPMENT AND INTANGIBLE ASSETS, NET - Summary of Estimated Amortization Expenses for Intangible Assets (Details)	Dec. 31, 2021 USD ($)
Property Equipment And Intangible Assets [Abstract]
2022	$ 16,732
2023	16,732
2024	16,732
2025	16,732
2026	16,732
Total	$ 83,660

NET INCOME (LOSS) PER SHARE (Details) - USD ($)	12 Months Ended
NET INCOME (LOSS) PER SHARE (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Numerator:
Net income (loss) attributable to ordinary shareholders of UP Fintech Holding Limited	$ 14,690,701	$ 16,064,793	$ (6,589,431)
Less:
The dilutive effect arising from the convertible bonds	2,900,645
Numerator for diluted net income (loss) per ordinary share	$ 11,790,056	$ 16,064,793	$ (6,589,431)
Weighted average shares used in calculating net income (loss) per ordinary share
Basic	2,205,186,257	2,117,904,025	1,751,784,176
Dilutive effect of convertible bonds	80,459,006
Diluted	2,335,717,204	2,162,232,325	1,751,784,176
Net income (loss) per ordinary share
Basic	$ 0.01	$ 0.01	$ 0.00
Diluted	$ 0.01	$ 0.01	$ 0.00
Share Options
Weighted average shares used in calculating net income (loss) per ordinary share
Dilutive effect	17,457,965	25,462,481
Restricted Shares Units
Weighted average shares used in calculating net income (loss) per ordinary share
Dilutive effect	32,613,976	18,865,819

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Receivables from Customers (Details 1) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Balance at the beginning of the year	$ 91,788
Accruals	426,953	$ 91,788	$ 0
Balance at the end of the year	$ 518,741	$ 91,788

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue recognition (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
IPO Distribution Services
Revenue from contracts with customers	$ 12,565,574	$ 13,760,209	$ 3,142,763
Currency Exchange Service
Revenue from contracts with customers	$ 12,607,089	$ 2,530,145	$ 246,135

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9031-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9038-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130543-203045

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9054-108599

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

+ Details

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Total revenues	$ 264,488,162	$ 138,496,690	$ 58,662,900
Interest expense	(18,378,823)	(10,102,290)	(4,101,528)
Total Net Revenues	246,109,339	128,394,400	54,561,372
Operating cost and expenses:
Execution and clearing	(31,143,578)	(12,645,113)	(2,519,238)
Employee compensation and benefits (including share-based compensation of US$4,062,600, US$6,054,612 and US$13,370,377 for the years ended December 31, 2019, 2020 and 2021, respectively)	(87,160,214)	(50,039,073)	(35,787,458)
Occupancy, depreciation and amortization	(6,134,991)	(4,735,881)	(3,572,260)
Communication and market data	(22,121,263)	(10,320,505)	(6,494,006)
Marketing and branding	(59,264,634)	(15,871,777)	(7,103,178)
General and administrative	(22,705,839)	(13,748,818)	(9,259,484)
Total operating cost and expenses	(228,530,519)	(107,361,167)	(64,735,624)
Other income:
Fair value change from convertible bonds	4,194,848
Others, net	(2,719,196)	996,559	869,028
(Loss) income before income taxes	19,054,472	22,029,792	(9,305,224)
Income tax benefit (expense)	(4,363,771)	(2,850,547)	3,355,366
Net (loss) income	14,690,701	19,179,245	(5,949,858)
Less:
Net income attributable to redeemable non-controlling interests		3,114,452	639,573
Net (loss) income attributable to ordinary shareholders of UP Fintech Holding Limited	$ 14,690,701	$ 16,064,793	$ (6,589,431)
Net (loss) income per share attributable to ordinary shareholders of UP Fintech Holding Limited:
Basic	$ 0.01	$ 0.01	$ 0.00
Diluted	$ 0.01	$ 0.01	$ 0.00
Weighted average shares used in calculating net (loss) income per ordinary share:
Basic	2,205,186,257	2,117,904,025	1,751,784,176
Diluted	2,335,717,204	2,162,232,325	1,751,784,176
Other comprehensive (loss) income, net of tax:
Unrealized gain on available-for-sale securities (net of tax effect of nil, US$6,284 and nil for the years ended December 31, 2019, 2020 and 2021, respectively)	$ 1,899,605	$ 41,149
Change in cumulative foreign currency translation adjustment	1,839,022	3,752,464	$ (321,433)
Total Comprehensive (loss) income	18,429,328	22,972,858	(6,271,291)
Total Comprehensive income attributable to redeemable non-controlling interests		3,114,452	639,573
Total Comprehensive (loss) income attributable to ordinary shareholders of UP Fintech Holding Limited	18,429,328	19,858,406	(6,910,864)
Commissions
Revenues:
Revenues	147,198,648	77,628,521	26,697,958
Financing service fees
Revenues:
Revenues	9,268,819	6,576,622	7,926,766
Interest income
Revenues:
Revenues	70,335,156	31,754,541	16,505,185
Other revenues
Revenues:
Revenues	$ 37,685,539	$ 22,537,006	$ 7,532,991

SUMMARY OF SIGNIFICANT ACCOUNTING - BUSINESS ACQUISITIONS - Purchase price allocation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Oct. 26, 2021	Dec. 31, 2020	Dec. 31, 2019
Intangible assets
Goodwill (note 5)	$ 2,492,668		$ 2,421,403	$ 2,421,403
Total purchase price	2,969,533
TradeUp Securities
Business Acquisition [Line Items]
Cash and cash equivalents	339,611
Cash-segregated for regulatory purpose	22,094,198
Other current assets	5,098,900
Property, plant and equipment	5,581
Intangible assets
Operating License	6,900,000
Goodwill (note 5)	2,421,403
Other current liabilities	(26,062,403)
Deferred tax liabilities	(1,449,000)
Total purchase price	$ 9,348,290
TradeUp Securities \| Minimum
Intangible assets
Useful life (in years)	3 years
TradeUp Securities \| Maximum
Intangible assets
Useful life (in years)	5 years
Ocean Joy Holdings Limited ("Ocean Joy")
Business Acquisition [Line Items]
Cash and cash equivalents	$ 3,664,133
Cash-segregated for regulatory purpose	2,166,432
Other current assets	190,132
Property, plant and equipment	82,284
Intangible assets
Operating License	527,060
Goodwill (note 5)	71,265
Other current liabilities	(17,346)
Deferred tax liabilities	(86,965)
Total purchase price		$ 2,969,533
Trading rights	128,551
Other non-current assets	218,537
Payable to customers	(2,884,596)
Other payables	(2,018,511)
Net identifiable assets acquired	2,898,268
Receivables-Brokers, dealers and clearing organizations	915,497
Deferred tax assets, net	$ 13,060
Ocean Joy Holdings Limited ("Ocean Joy") \| Minimum
Intangible assets
Useful life (in years)	3 years
Ocean Joy Holdings Limited ("Ocean Joy") \| Maximum
Intangible assets
Useful life (in years)	5 years

SHARE BASED COMPENSATION

12 Months Ended

Dec. 31, 2021

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

SHARE BASED COMPENSATION

12.	SHARE‑BASED COMPENSATION

The Group implemented a share incentive plan in June 2014 (the “2014 Plan”) which allows the Group to grant options and restricted share units to employees, directors and consultants of the Group. Under the 2014 Plan, the maximum aggregate number of shares that may be issued shall not exceed 187,697,314 ordinary shares.

In relation with the Re‑domiciliation, the Company adopted the 2018 share incentive plan, which was approved by the board of directors of the Company to replace the previous 2014 share incentive plan created in June 2014. The terms of the 2018 share incentive plan are substantially the same as those under the 2014 share incentive plan, except that the number of options and restricted share units and exercise price were adjusted on a diluted basis in accordance to the shares number of the Company upon the Re‑domiciliation. The awards granted and outstanding under the 2014 share incentive plan survived and remained effective and binding under the 2018 share incentive plan. In December 2018, the Board of Directors of the Company approved to expand the aggregate number of shares that may be issued to not exceed 254,697,314 ordinary shares.

In March 2019, the Group implemented the 2019 Performance Incentive Plan (the “2019 Plan”), which was approved by the board of directors of the Company to grant a maximum number of 52,000,000 ordinary shares under the 2019 Plan.

In December, 2020, 10,429,305 treasury stock repurchased under the Share Repurchase Program were approved by the board of directors of the Company to increase the shares issuable under 2019 Plan from 52,000,000 shares to 62,429,305 shares.

In September, 2021, 36,534,437 Class A ordinary shares issued under the evergreen plan were approved by the board of directors of the Company to increase the award pool under 2019 Plan from 62,429,305 shares to 98,963,742 shares.

Share options

The Company has granted service-based share options, which vest and become exercisable in three installments, with 50% of the total number of ordinary shares subject to such option becoming vested and exercisable on the second anniversary of the vesting commencement date, and 25% becoming vested and exercisable on each of the third and fourth anniversary of the vesting commencement date. The grant date of the share options is the vesting commencement date. The Company also has granted performance-based share options with performance conditions included semi-annual performance results and operating and financial results of the Company. The performance-based share options will commence to vest once the performance conditions are satisfied. Upon termination of employment, all the options that have not been vested will be forfeited. The terms of the options shall not exceed ten years from the date of grant. In addition, the Company has the right to purchase:

upon termination for death, disability or retirement, the employees’ vested and/or exercised options at a price of 50% of the fair market value as of the latest practicable date prior to the termination, within 6 months from the employees’ termination;

upon dismissal for cause, all the employees’ vested and/or exercised option at a purchase price equals to the exercise price the employees paid to the Company;

upon other terminations of employment, the employees’ vested and/or exercised option at a price of 30% of the fair market value as of the latest practicable date prior to the termination, within 6 months from the employees’ termination.

12.	SHARE‑BASED COMPENSATION (Continued)

Share options (Continued)

As the terms permit the Company to purchase these share options at an amount that is equal to or less than the fair value, the Company evaluates the classification for each awards upon the occurrence of each employment termination. The termination of employees have been insignificant for all periods presented. As of December 31, 2020 and 2021, the share option award is classified as equity.

The Group calculated the estimated fair value of the options on the respective grant dates using the binomial‑lattice option valuation model with the following assumptions for each applicable period which took into account variables such as volatility, dividend yield, and risk‑free interest rate, the probability that the option will be exercised prior to the end of its contractual life, and the probability of termination or retirement of the option holder in computing the value of the option.

The fair value of the options granted was estimated on the date of grant that prepared by the management with the assistance of an independent third‑party appraiser, and was determined using a binomial model with the following assumptions:

	Fair value per ordinary share at grant date⁽¹⁾		Exercise price⁽²⁾		Expected volatility⁽³⁾	Contractual life⁽⁴⁾	Risk-free interest rate⁽⁵⁾	Expected dividend⁽⁶⁾
	US$		US$
Granted in 2014		0.008		0.00001	40%	10 years	3.0-3.1%		0.0
Granted in 2015	0.008-0.016			0.00001	39%	10 years	2.5-3.1%		0.0
Granted in 2016	0.019-0.030			0.00001	39%	10 years	2.3-3%		0.0
Granted in 2017	0.034-0.059		0.00001-0.040		39%	10 years	3.0-3.2%		0.0
Granted in 2018	0.147-0.405		0.0001-0.200		35-38%	10 years	3.1-3.8%		0.0
Granted in 2019	0.274-0.484		0.00001-0.274		37-39%	10 years	3.0-3.4%		0.0
Granted in 2021	0.2184			1.1853	55%	10 years	0.88%		0.0

(1)

Fair value of underlying ordinary shares. Prior to the completion of initial public offering, the estimated fair value of the ordinary shares underlying the options as of the respective grant dates was determined based on a valuation with the assistance of a third party appraiser. The fair value of the underlying ordinary shares is determined based on the closing market price of the share after the completion of initial public offering in March 2019.

(2)	Exercise price. The exercise price of the options was determined by the Company’s Board of Directors.

(3)	Volatility. The volatility of the underlying ordinary shares was estimated based on the historical share price movement of the comparable companies for the period of time close to the expected time to exercise.

(4)	Contractual life. The contractual life of the share options was the period between the grant date and the expiry date.

(5)	Risk free rate. Risk free rate is estimated based on market yield of U.S. Sovereign Curve with maturity close to the share options as of the valuation date, plus country spread.

(6)	Expected dividend. The Company does not expect to declare any dividends in the foreseeable future.

12.	SHARE‑BASED COMPENSATION (Continued)

Share options (Continued)

A summary of the Company’s share option activities for the years ended December 31, 2020 and 2021 is presented below:

	Number of share options			Weighted average exercise price		Weighted average remaining contractual life		Aggregate intrinsic value
				US$		Years		US$
Outstanding as of January 1, 2020		95,933,244			0.05223		8.46		17,694,050
Cancelled to grant RSUs		(7,660,000	)		0.27400
Exercised		(16,688,995	)		0.00031
Forfeited		(11,840,000	)		0.09374
Outstanding as of December 31, 2020		59,744,249			0.03005		7.50		29,829,248
Granted		750,000			1.18530
Exercised		(15,767,275	)		0.03322
Forfeited		(370,185	)		0.04544
Outstanding as of December 31, 2021		44,356,789			0.04833		6.77		12,375,711

The aggregate intrinsic value is calculated as the difference between the exercise price of the awards and the fair value of the underlying ordinary shares at each reporting date, for those awards that had exercise price below the estimated fair value of the relevant ordinary shares.

The Group recognized share-based compensation expenses with no income tax benefit relating to the share options of US$2,239,136, US$1,701,132 and US$4,272,939 for the years ended December 31, 2019, 2020 and 2021, respectively. As of December 31, 2021, total unrecognized share-based compensation expenses relating to these share options was US$9,455,252. The expense is expected to be recognized over a weighted-average period of 3.6 years.

RSUs

On April 30, 2020, the Company cancelled 7,660,000 stock options and 900,000 RSUs granted historically, and granted 8,560,000 RSUs to employee on May 1, 2020. Those restricted shares vest over a period of 3 to 3.5 years. The cancellation of stock options and RSUs accompanied by the concurrent grant of a replacement RSUs is accounted for as a modification. The incremental share-based compensation of this replacement is US$0.8 million. Total amount of unrecognized share-based compensation of unvested options and RSUs and incremental share-based compensation is US$1.7 million.

12.	SHARE‑BASED COMPENSATION (Continued)

RSUs (Continued)

A summary of the Company’s RSU activities for the years ended December 31, 2020 and 2021 is presented below:

	Number of Units			Weighted-Average Grant-Date Fair Value
				US$
Unvested as of January 1, 2020		28,406,980			0.34
Granted		44,179,590			0.23
Cancelled to grant new RSUs		(900,000	)		0.26
Exercised		(449,990	)		0.23
Forfeited		(1,410,000	)		0.20
Unvested as of December 31, 2020		69,826,580			0.28
Granted		21,259,735			0.97
Exercised		(22,237,430	)		0.34
Forfeited		(3,032,440	)		0.34
Unvested as of December 31, 2021		65,816,445			0.48

The Group recognized share-based compensation expenses with no income tax benefit relating to RSUs (including the expense upon medication) of US$1,823,464, US$4,353,480 and US$9,097,438 for the years ended December 31, 2019, 2020 and 2021, respectively. As of December 31, 2021, total unrecognized share-based compensation expenses relating to these RSUs was US$22,309,037. The expense is expected to be recognized over a weighted average period of 2.3 years.

Lease (Tables)

12 Months Ended

Dec. 31, 2021

Lessee Disclosure [Abstract]

Schedule of balances reported in the consolidated balance sheets related to the Group's leases

The following table presents balances reported in the consolidated balance sheets related to the Group's leases:

	For the years ended December 31,
	2020		2021
	US$		US$
Operating lease right-of-use assets		7,280,763		6,613,520
Operating lease liabilities		7,207,293		5,702,954

Schedule of operating lease expenses and short-term lease expenses

The following table presents operating lease expenses and short-term lease expenses reported in the consolidated statements of comprehensive income (loss) related to the Group's leases:

17.	Lease (Continued)

Operating leases (Continued)

	For the years ended December 31,
	2020		2021
	US$		US$
Operating lease expenses		2,985,665		3,881,251
Short-term lease expenses		508,791		257,150

Summary of supplemental information related to operating leases

A summary of supplemental information related to operating leases as of December 31, 2021 is as follows:

	For the years ended December 31,
	2020			2021
	US$			US$
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used in operating leases		3,422,191			5,058,078
Non-cash right-of-use assets in exchange for new lease obligations:
Operating leases		4,281,660			4,058,759
Weighted average remaining lease term:
Operating leases	3 years			4 years
Weighted average discount rate:
Operating leases		5.3	%		5.5	%

Summary of maturity analysis of the annual undiscounted cash flows

The following is a maturity analysis of the annual undiscounted cash flows for the annual periods ended December 31:


	2021
	US$
Years ending December 31:
2022		2,695,299
2023		1,036,814
2024		838,969
2025		452,218
2026		465,785
2027 and after		805,931
Total undiscounted operating lease payments		6,295,016
Less: imputed interest		(592,062	)
Present value of operating lease liabilities		5,702,954

INCOME TAXES (Details) - USD ($)	12 Months Ended
INCOME TAXES (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure
Income tax rate (as a percent)	25.00%	25.00%	25.00%
Withholding income tax on dividends distributed by a foreign investment enterprise	10.00%
Maximum withholding tax rate (in percent)	5.00%
Minimum percentage of shares to be held for withholding tax	25.00%
Withholding tax	$ 0	$ 0
Undistributed earnings of subsidiaries	57,900,000	33,100,000
Unrecognized deferred tax liability related to earning	$ 4,500,000	$ 1,700,000
PRC
Income Tax Disclosure
Income tax rate (as a percent)	25.00%
HNTE
Income Tax Disclosure
Income tax rate (as a percent)	15.00%
Preferential tax rate (as a percent)	15.00%
New Zealand
Income Tax Disclosure
Minimum percentage of shares to be held for withholding tax	5.00%
Withholding tax rate	0
Withholding tax imposed rate	15
New Zealand \| Tiger Brokers
Income Tax Disclosure
Income tax rate (as a percent)	28.00%
New Zealand \| Tiger Fintech Limited
Income Tax Disclosure
Income tax rate (as a percent)	28.00%
Hong Kong \| Scenario 1
Income Tax Disclosure
Income tax rate (as a percent)	8.25%
Base profit for calculating tax rate	$ 2,000,000
Hong Kong \| Scenario 2
Income Tax Disclosure
Income tax rate (as a percent)	16.50%
Base profit for calculating tax rate	$ 2,000,000
USA
Income Tax Disclosure
Income tax rate (as a percent)	21.00%
Maximum withholding tax rate (in percent)	30.00%
SINGAPORE
Income Tax Disclosure
Income tax rate (as a percent)	17.00%
AUSTRALIA
Income Tax Disclosure
Income tax rate (as a percent)	27.50%

CONVERTIBLE BOND PAYABLE (Tables)

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

Summary of Convertible Bonds Payable

	US$
2021 Series A1 Note US$ 44,000,000 1.00% due to 2026		37,148,318
2021 Series A2 Note US$ 21,000,000 1.00% due to 2026		21,120,487
2021 Series B Note US$ 90,000,000 1.00% due to 2026		90,572,871
		148,841,676

Lease - Maturity analysis of the annual undiscounted cash flows (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Years ending December 31:
2022	$ 2,695,299
2023	1,036,814
2024	838,969
2025	452,218
2026	465,785
2027 and after	805,931
Total undiscounted operating lease payments	6,295,016
Less: imputed interest	(592,062)
Present value of operating lease liabilities	$ 5,702,954	$ 7,207,293

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

12 Months Ended

Dec. 31, 2021

Accounting Policies [Abstract]

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of presentation and principle of consolidation

Consolidation of a sponsored fund

In November 2020, the sponsored fund was delisted and liquidated. Therefore it was deconsolidated in Group's consolidated financial statement since November 2020.

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Use of estimates

Fair value

Level 1

Level 1 applies to assets or liabilities for which there are quoted prices in active markets for identical assets or liabilities.

Level 2

Level 3

Level 3 applies to assets or liabilities for which there are unobservable inputs to the valuation methodology that are significant to the measurement of the fair value of the assets or liabilities.

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Fair value of financial instruments

Derivative financial instruments

Cash and cash equivalents

Cash—segregated for regulatory purpose

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Term deposits

Term deposits consist of bank deposits with an original maturity of greater than three months and less than one year.

Receivables from and payables to Customers

The table below presents the movement of allowance for doubtful accounts from customers for the year ended December 31, 2020 and 2021.

	For the years ended December 31,
	2020		2021
	US$		US$
Balance at the beginning of the year		—		91,788
Accruals		91,788		426,953
Balance at the end of the year		91,788		518,741

Receivables from and Payables to brokers, dealers and clearing organizations

Payables to brokers, dealers and clearing organizations include borrowed margin and cash collaterals received from securities borrowing transactions.

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Property, equipment, and intangible assets, net

Electronic equipment		3 years
Office equipment		5-14.25 years
Software		3-5 years
Leasehold improvement		Shorter of the lease terms or the estimated useful lives of the assets

Goodwill

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Lease

Long‑term investment

The Group’s long‑term investments consist of equity securities without readily determinable fair values, available‑for‑sale securities and equity method investment.

(a)	Equity securities without readily determinable fair values

(b)	Available‑for‑sale securities

Available‑for‑sale securities are carried at its fair value and the unrealized gains or losses from the changes in fair values are included in accumulated other comprehensive income or loss.

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Long‑term investment (Continued)

(c)	Equity method investment

Revenue recognition

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Revenue recognition (Continued)

Nature of Services

ii)

iii)

iv)

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Research and development expenses

Occupancy, Depreciation and Amortization

Share‑based compensation

Income taxes

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Income taxes (Continued)

Comprehensive income or loss

Treasury stock

Non‑controlling interests

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Foreign currencies

Net income (loss) per share

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Concentration of credit risk

Concentration of revenue

There is no customer accounting for 10% or more of total revenues for the years ended December 31, 2019, 2020 and 2021, respectively.

Concentration of supplier

For the years ended December 31, 2019, 2020 and 2021, 78.4%, 74.8% and 57.4% of its total net revenues were executed and cleared by one supplier.

Current Expected Credit Losses

Acquisition

Acquisition of TradeUp Securities

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Acquisition (Continued)

Acquisition of TradeUp Securities (Continued)

The purchase price was allocated at the date of acquisition as follows:

	US$			Amortization period
Cash and cash equivalents		339,611
Cash-segregated for regulatory purpose		22,094,198
Other current assets		5,098,900
Property, plant and equipment		5,581		3-5 years
Intangible assets
Operating License		6,900,000		Indefinite life
Goodwill (note 5)		2,421,403
Other current liabilities		(26,062,403	)
Deferred tax liabilities		(1,449,000	)
		9,348,290

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Acquisition (Continued)

Acquisition of Ocean Joy Holdings Limited (“Ocean Joy”)

The acquisition was recorded using the acquisition method of accounting. Accordingly, the acquired assets and liabilities were recorded at their fair value at the date of acquisition. The tangible and intangible assets valuation disclosed below was based on a valuation analysis prepared by the management with the assistance from an independent third-party appraiser. In order to value the intangible asset, MPEEM, a method of discount cash flow, was used. The MPEEM requires significant judgment and estimates by the management on future earnings as well as the economic useful life, taking into account certain factors including the appropriate discount rate. The consolidated financial performance of Ocean Joy and its sole subsidiary Tiger Broker HK since the Acquisition Date to December 31, 2021 constituted less than 0.1% of revenue of the Group’s consolidated financial performance for the year ended December 31, 2021, and the total consolidated assets of Ocean Joy and its sole subsidiary Tiger Broker HK accounted for less than 2.2% of that of the Group as of December 31, 2021.

The following table summarizes the consideration for this transaction:

	US$
The fair value of its previously held equity interests in Ocean Joy at the acquisition Date		462,784
Cash Consideration		1,079,830
Settlement of pre-existing balance with Ocean Joy		1,426,919
Total consideration		2,969,533

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Acquisition (Continued)

Acquisition of Ocean Joy Holdings Limited (“Ocean Joy”) (Continued)

The assets and liabilities recognized as of the acquisition are as follows :

	US$			Amortization period
Cash and cash equivalents		3,664,133
Cash-segregated for regulatory purpose		2,166,432
Receivables-Brokers, dealers and clearing organizations		915,497
Other current assets		190,132
Property, plant and equipment		82,284		3-5 years
Deferred tax assets, net		13,060
Intangible assets
Operating License		527,060		Indefinite life
Trading rights		128,551		Indefinite life
Other non-current assets		218,537
Payable to customers		(2,884,596	)
Other payables		(2,018,511	)
Other current liabilities		(17,346	)
Deferred tax liabilities		(86,965	)
Net identifiable assets acquired		2,898,268
Add: goodwill (Note 5)		71,265
Total		2,969,533

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Acquisition (Continued)

Acquisition of Ocean Joy Holdings Limited (“Ocean Joy”) (Continued)

Pro forma information of acquisitions

	For the years ended December 31,
	2020		2021
	US$		US$
	Unaudited		Unaudited
Pro forma net revenue		138,662,645		264,887,363
Pro forma net income		18,900,392		14,521,983

Recent Accounting Pronouncements

2.	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Recent Accounting Pronouncements (Continued)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Consolidation of sponsored funds and Derivative financial instruments (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Gain or loss recognized upon deconsolidation	$ 0
Derivatives reflected in financial instruments held at fair value	3,902,987	$ 562,536
Realized loss	0	2,316,585
Unrealized loss	80,703	0
Stock Index Future Contracts and Warrants
Derivatives reflected in financial instruments held at fair value	$ 12,906	$ 0

RELATED PARTY BALANCES AND TRANSACTIONS - Transactions with related parties (Parenthetical) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2021
Alphalion Group Limited
RELATED PARTY BALANCES AND TRANSACTIONS
Gain from sale of a Group's subsidiary	$ 617,500
Alphalion Group Limited \| IT Service Fees
RELATED PARTY BALANCES AND TRANSACTIONS
Consideration for sale	$ 106,105
Xiaomi Corporation and its affiliates \| Convertible Bonds
RELATED PARTY BALANCES AND TRANSACTIONS
Effective interest rate		5.40%

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property, equipment, and intangible assets, net (Details)	12 Months Ended
	Dec. 31, 2021
Electronic Equipment
Property Plant And Equipment [Line Items]
Useful life (in years)	3 years
Office Equipment \| Minimum
Property Plant And Equipment [Line Items]
Useful life (in years)	5 years
Office Equipment \| Maximum
Property Plant And Equipment [Line Items]
Useful life (in years)	14 years 3 months
Software \| Minimum
Property Plant And Equipment [Line Items]
Useful life (in years)	3 years
Software \| Maximum
Property Plant And Equipment [Line Items]
Useful life (in years)	5 years

STATUTORY RESERVES AND RESTRICTED NET ASSETS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Minimum annual appropriation to general reserve fund as a percentage of after tax profit	10.00%
Threshold percentage of general reserve fund to registered capital	50.00%
Appropriation to statutory reserve funds	$ 899,337	$ 1,939,543	$ 724,008
Amount of restricted net asset unconsolidated subsidiaries	$ 63,908,860	$ 48,315,519

SHARE BASED COMPENSATION - Restricted Share Units ("RSUs") (Details) - USD ($)		12 Months Ended
	Apr. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total share based compensation		$ 13,370,377	$ 6,054,612	$ 4,062,600
Service-based RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Beginning balance		69,826,580	28,406,980
Granted		21,259,735	44,179,590
Cancelled to grant new RSUs	900,000		(900,000)
Exercised		(22,237,430)	(449,990)
Forfeited		(3,032,440)	(1,410,000)
Ending balance		65,816,445	69,826,580	28,406,980
Beginning balance		$ 0.28	$ 0.34
Granted		0.97	0.23
Cancelled to grant new RSUs			0.26
Exercised		0.34	0.23
Forfeited		0.34	0.20
Ending balance		$ 0.48	$ 0.28	$ 0.34
Weighted average period expected to be recognized for unrecognized share based compensation expense		2 years 3 months 18 days
Total share based compensation		$ 9,097,438	$ 4,353,480	$ 1,823,464
Total unrecognized share based compensation expense		$ 22,309,037
Share options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted	8,560,000
Number of options cancelled during the period	7,660,000		7,660,000
Weighted average period expected to be recognized for unrecognized share based compensation expense		3 years 7 months 6 days
Total share based compensation	$ 800,000	$ 4,272,939	$ 1,701,132	$ 2,239,136
Total unrecognized share based compensation expense	$ 1,700,000
Restricted Share Units ("RSUs") \| Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average period expected to be recognized for unrecognized share based compensation expense	3 years
Restricted Share Units ("RSUs") \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average period expected to be recognized for unrecognized share based compensation expense	3 years 6 months

FAIR VALUE MEASUREMENT - Movements of level 3 fair value measurements (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment	$ (600,000)	$ 0	$ (755,524)
Foreign currency translation adjustment	1,839,022	3,752,464	(321,433)
Fair Value, Nonrecurring \| Significant unobservable inputs (level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, Fair value measurements	3,924,051	3,980,806
Additions during the year	1,000,000
Net unrealized gains	2,871,477	41,149
Impairment		(150,978)
Foreign currency translation adjustment	19,227	53,074
Assets, Fair value measurements	$ 7,814,755	$ 3,924,051	$ 3,980,806

INCOME TAXES

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

INCOME TAXES

8.	INCOME TAXES

PRC

Under the PRC Enterprise Income Tax Law (the “EIT Law”), the standard enterprise income tax rate for domestic enterprises and foreign invested enterprises is 25%. In addition, the EIT Law and its implementing rules permit qualified “High and New Technologies Enterprise” (the “HNTE”) to enjoy a reduced 15% EIT rate. Beijing U‑Tiger Business began to qualify as an HNTE under the EIT Law in 2017, subject to the tax rate of 15% with a valid period of three years starting from December 2017 and obtained a new certificate on December 2, 2020, subject to the tax rate of 15% with a valid period of three years, ending on December 31, 2022. Beijing Yixin and Beijing U-Tiger Network qualified as HNTE under the EIT Law on October 25, 2021 and December 17, 2021, respectively, subject to the tax rate of 15% with a valid period of three years, ending on December 31, 2023. The Group’s other subsidiaries are subject to income tax rate of 25%, according to EIT Law.

Cayman Islands

Under the current laws of the Cayman Islands, the Group is not subject to tax on its income or capital gains.

New Zealand

The Group’s subsidiaries, TBNZ and TFNZ are located in New Zealand and are subject to an income tax rate of 28% for taxable income earned in New Zealand.

Hong Kong

The Group’s subsidiaries, Up International, Tiger Technology, Tiger Brokers HK, Kastle limited, Tung Chi and Tiger Assets, are located in Hong Kong and are subject to a profits tax rate of 8.25% on assessable profits up to HK$2,000,000 and 16.5% on any part of assessable profits over HK$2,000,000.

USA

The Group’s subsidiaries, TradeUP Securities, US Tiger Securities, Tiger Fintech Holdings, Trading Front, Tradeup and Wealthn LLC, are located in the USA and are subject to a federal income tax rate of 21% for taxable income earned in the USA.

Singapore

The Group’s subsidiaries, Tiger SG and Tiger Brokers SG, are located in Singapore and are subject to an income tax rate of 17% for taxable income earned in Singapore.

Australia

The Group’s subsidiaries, TBAU, Tiger Services AU, Fleming Funds Management PTY Limited and Tiger investor Services PTY Limited, are located in Australia and are subject to an income tax rate of 27.5% for taxable income earned in Australia.

8.	INCOME TAXES (Continued)

The components of income (loss) before income taxes are as follows:

	For the years ended December 31,
	2019			2020			2021
	US$			US$			US$
The Cayman Islands		946,035			(1,302,817	)		2,442,082
PRC		6,117,021			20,551,832			21,320,470
International		(16,368,280	)		2,780,777			(4,708,080	)
Total income (loss) before income taxes		(9,305,224	)		22,029,792			19,054,472

The current and deferred portions of income tax expense (benefit), all of which was incurred outside the Cayman Islands, included in the consolidated statements of comprehensive income (loss) were as follows:

	For the years ended December 31,
	2019			2020		2021
	US$			US$		US$
Current tax expense		2,859,774			1,077,877		5,026,081
Deferred tax expense (benefit)		(6,215,140	)		1,772,670		(662,310	)
Income tax expense (benefit)		(3,355,366	)		2,850,547		4,363,771

The related enterprise income tax law also imposes a withholding income tax of 10% on dividends distributed by a foreign investment enterprise ("FIE") to its immediate holding company outside of the PRC, if such immediate holding company is considered as a non-resident enterprise without any establishment or place within the PRC or if the received dividends have no connection with the establishment or place of such immediate holding company within the PRC, unless such immediate holding company's jurisdiction of incorporation has a tax treaty with the PRC that provides for a different withholding arrangement. The Cayman Islands, where the Company is incorporated, does not have such tax treaty with the PRC. According to the arrangement between Mainland China and HKSAR on the Avoidance of Double Taxation and Prevention of Fiscal Evasion in August 2006, dividends paid by an FIE in Mainland China to its immediate holding company in HKSAR will be subject to withholding tax at a rate of no more than 5% (if the foreign investor owns directly at least 25% of the shares of the FIE). Cash dividends paid by a HKSAR incorporated company to a non-HKSAR tax resident shareholder that holds all of the shares in the HKSAR company are not subject to HKSAR withholding tax. Dividends paid from US sources to foreign corporations are subject to US withholding tax at a rate of 30% or a lower rate under an applicable tax treaty. The British Virgin Islands, where the parent company of US companies is incorporated, does not have such tax treaty with the US. The Cayman Islands operates a system of indirect taxation. No direct taxes are imposed on net or gross income or gains of individuals or companies, nor are there any withholding taxes, estate duties, inheritance, or gift taxes. Cash dividends paid by a New Zealand incorporated company to a non-New Zealand tax resident shareholder that holds all of the shares in the New Zealand company are subject to New Zealand withholding tax at the rate of 0% if those dividends are fully imputed. If any part of a cash dividend paid to such a shareholder is not fully imputed then New Zealand withholding tax is imposed at the rate of 15% on that part of the dividend, although that rate is reduced to 5% if the shareholder is able to take the benefit of Article 10 of the New Zealand-Singapore Double Tax Agreement. The Company does not intend to have any of its subsidiaries located in the PRC, HKSAR, the USA, the Cayman Islands and New Zealand distribute any undistributed profits of such subsidiaries in the foreseeable future, but rather expects that such profits will be indefinitely reinvested by such subsidiaries for their respective local operations. Accordingly, no withholding tax was recorded as of December 31, 2020 and 2021. Undistributed earnings of such subsidiaries that are not distributed amounted to US$33.1 million and US$57.9 million and unrecognized deferred tax liability related to such earning amounted to US$1.7 million and US$4.5 million as of December 31, 2020 and December 31, 2021, respectively.

The Group’s subsidiaries and consolidated VIEs located in the PRC, HKSAR, New Zealand, the USA, Singapore and other jurisdictions are open to tax examination for the period from its inception until the years ended December 31, 2021.

8.	INCOME TAXES (Continued)

The significant components of the Group’s deferred tax assets and liabilities were as follows:

	As of December 31,
	2020			2021
	US$			US$
Deferred tax assets
Accrued expenses		—			64,103
Allowance for doubtful accounts		25,704			142,385
Long-term investments		38,314			39,230
Advertising expense carryforwards		877,424			1,081,850
Net operating loss carryforwards		13,407,157			15,101,309
Withholding tax credit carryforwards		1,106,569			1,161,221
Lease liabilities		1,799,483			1,511,324
Total deferred tax assets		17,254,651			19,101,422
Less: valuation allowance		(4,000,159	)		(5,224,095	)
Deferred tax assets, net of valuation allowance		13,254,492			13,877,327

Deferred tax liabilities
Right-of-use assets		1,799,483			1,511,324
Long term investments		86,042			88,098
Intangible assets		1,449,000			1,535,965
Financial instruments held, at fair value		—			19,545
Total deferred tax liabilities		3,334,525			3,154,932

Deferred tax assets, net		9,919,967			12,258,360
Deferred tax liabilities, net		—			1,535,965

The movement of the valuation allowance is as follows:

	For the years ended December 31,
	2019			2020			2021
	US$			US$			US$
Balance at the beginning of the year		2,931,196			4,888,240			4,000,159
Additions of valuation allowance		2,573,942			1,775,887			2,814,445
Reversals of valuation allowance		—			(2,802,174	)		(1,628,176	)
Foreign currency translation adjustment		(616,898	)		138,206			37,667
Balance at the end of the year		4,888,240			4,000,159			5,224,095

A valuation allowance is provided against deferred tax assets when the Group determines that it is more-likely-than-not that the deferred tax assets will not be realized in the future. The Group considers positive and negative evidence on each individual subsidiary basis to determine whether some portion or all of the deferred tax assets will be more-likely-than-not realized.

As of December 31, 2020 and 2021, the Group had net operating loss carryforwards of US$64,430,676 and US$83,597,429, respectively.

8.	INCOME TAXES (Continued)

Management assessed the positive and negative evidence in certain entities in the PRC, United States, New Zealand and Singapore, and estimated they will have sufficient future taxable income to utilize the existing deferred tax assets. Significant objective positive evidence included the significant growth in customer trading activities in the New Zealand entities where net operating loss carryforwards could be carried forward indefinitely, net operating loss carryforwards in the United States generated after 2017 that can be carried forward indefinitely, and net operating loss carryforwards in Singapore that can be carried forward indefinitely. Net operating loss carryforwards can be carried forward 5 years in PRC except for a PRC entity qualified as “HNTE” which can be carried forward 10 years. The Group has concluded that deferred tax asset recognized for certain entities in the PRC, United States, New Zealand and Singapore is more likely than not to be realized.

The expiration status of net operating loss carryforwards as of December 31, 2021 is listed below.

Expiration year	US$
2022		7,170
2023		434,585
2024		4,222,851
2025		9,112,742
2026 through 2031		40,608,576
Indefinitely		29,211,505

As of December 31, 2020 and 2021, the Group had advertising expenses carryforwards of US$4,712,189 and US$4,598,999, respectively, which can be carried forward indefinitely.

As of December 31, 2020 and 2021, the Group had withholding tax credit carryforwards of US$1,106,569 and US$1,161,221, respectively, Among the withholding tax credit carryforwards as of December 31, 2021, US$984,315 will expire, by 2025 while US$176,906 will expire in 2026.

The realizability of deferred tax assets requires significant judgment associated with evaluation of past and projected financial performance which incorporates projections of future taxable income by tax-paying component. In assessing the realizability of deferred tax assets, management considered the future taxable earnings and the expected timing of the reversal of temporary differences. As of December 31, 2020 and 2021 valuation allowances of US$3,867,639 and US$4,614,648 respectively, were provided for net operating loss carryforwards totaled US$20,695,157 and US$27,152,139, while the remaining net operating loss carryforwards of US$43,735,519 and US$56,445,290 is expected to be utilized prior to expiration considering future taxable income for respective tax-paying component. Deferred tax assets related to net operating loss carryforwards of US$4,607,181 without a valuation allowance were generated in 2021. Due to changes in judgment about the realizability of deferred tax assets in 2021, valuation allowance increases of US$475,079 and decreases of US$405,767 were recorded in 2021. The Group realized a benefit of utilizing DTAs of US$171,363 in 2021 that were offset with a valuation allowance at the beginning of the year. To the extent that actual experience deviates from the assumptions, the projections would be affected and hence management’s assessment of realizability of deferred tax assets may change.

8.	INCOME TAXES (Continued)

Reconciliations between the income tax expense (benefit) computed by applying the PRC statutory income tax rate to income (loss) before income taxes and the actual income tax expense (benefit) were as follows:

	For the years ended December 31,
	2019			2020			2021
	US$			US$			US$
Income (loss) before income taxes		(9,305,224	)		22,029,792			19,054,472
PRC statutory tax rate		25	%		25	%		25	%
Income tax at statutory income tax rate		(2,326,306	)		5,507,448			4,763,618
Effect of income tax rate difference in other jurisdictions		124,406			(773,402	)		596,978
Effect of preferential tax rates		(2,673,841	)		1,837,667			(1,735,439	)
Super deduction of research and development expense		(2,479,428	)		(3,607,755	)		(4,476,114	)
Effect of expenses not deductible for income tax purposes		1,425,861			912,876			4,028,459
Changes in valuation allowance		2,573,942			(1,026,287	)		1,186,269
Income tax expense (benefit)		(3,355,366	)		2,850,547			4,363,771

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 21
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32857-109319

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 11.C)
-URI http://asc.fasb.org/extlink&oid=122134291&loc=d3e330215-122817

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 17
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32809-109319

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 6.I.5.Q1)
-URI http://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32705-109319

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 270
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6424409&loc=d3e44925-109338

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-URI http://asc.fasb.org/topic&trid=2144680

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

LONG TERM INVESTMENTS - Equity securities without readily determinable fair value - (Details)	1 Months Ended											12 Months Ended
	Nov. 30, 2021 USD ($) shares	Sep. 30, 2021 shares	Aug. 31, 2021 USD ($)	Aug. 31, 2021 CNY (¥)	Jul. 31, 2021 USD ($) shares	Apr. 30, 2021 USD ($)	Apr. 30, 2021 CNY (¥)	Feb. 28, 2021 USD ($) shares	Dec. 31, 2019 USD ($)	Oct. 31, 2017 USD ($)	Oct. 31, 2017 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Equity Securities Without Readily Determinable Fair Value [Line Items]
Equity securities without readily determinable fair value												$ 3,565,394	$ 2,132,567
Payment for longterm investments												2,450,736		$ 600,000
TradeUP Acquisition Corp.("UPTDU")
Equity Securities Without Readily Determinable Fair Value [Line Items]
Equity securities without readily determinable fair value												$ 445,400
Percentage of equity interest acquired												4.54%
Payment for longterm investments					$ 445,400			$ 445,400
Change of fair value												$ 0
TradeUP Acquisition Corp.("UPTDU") \| Founder Shares
Equity Securities Without Readily Determinable Fair Value [Line Items]
Number of shares acquired \| shares								230,000
Number of shares forfeited \| shares		8,500
TradeUP Acquisition Corp.("UPTDU") \| Private Shares
Equity Securities Without Readily Determinable Fair Value [Line Items]
Number of shares acquired \| shares					44,040
Fortune Rise Acquisition Corporation ("FRLAU")
Equity Securities Without Readily Determinable Fair Value [Line Items]
Equity securities without readily determinable fair value												201,248
Percentage of equity interest acquired	1.57%
Payment for longterm investments	$ 201,248
Change of fair value												0
Fortune Rise Acquisition Corporation ("FRLAU") \| Founder Shares
Equity Securities Without Readily Determinable Fair Value [Line Items]
Number of shares acquired \| shares	122,000
Fortune Rise Acquisition Corporation ("FRLAU") \| Private Shares
Equity Securities Without Readily Determinable Fair Value [Line Items]
Number of shares acquired \| shares	20,000
Fortune Rise Acquisition Corporation ("FRLAU") \| Representative Shares
Equity Securities Without Readily Determinable Fair Value [Line Items]
Number of shares acquired \| shares	60,000
Shenzhen Guru Club Information Technology Group Co., LTD. ("Guru")
Equity Securities Without Readily Determinable Fair Value [Line Items]
Equity securities without readily determinable fair value												1,569,218	1,532,567
Percentage of equity interest acquired										1.00%	1.00%
Payment for longterm investments										$ 1,536,972	¥ 10,000,000
Change of fair value												0	0
Shanghai Realize Investment Consulting Co., Ltd. ("Realize")
Equity Securities Without Readily Determinable Fair Value [Line Items]
Equity securities without readily determinable fair value												941,531
Percentage of equity interest acquired			1.50%	1.50%
Payment for longterm investments			$ 926,183	¥ 6,000,000
Change of fair value												0
Shanghai Yisong Consulting Management Co., LTD ("Yisong")
Equity Securities Without Readily Determinable Fair Value [Line Items]
Equity securities without readily determinable fair value												407,997
Percentage of equity interest acquired						5.00%	5.00%
Payment for longterm investments						$ 400,962	¥ 2,600,000
Change of fair value												0
UNext Group Limited ("UNext")
Equity Securities Without Readily Determinable Fair Value [Line Items]
Equity securities without readily determinable fair value													$ 600,000
Percentage of equity interest acquired									0.60%
Payment for longterm investments									$ 600,000
Impairment of equity securities without readily determinable fair value												$ 600,000

TREASURY STOCK (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Mar. 25, 2020
TREASURY STOCK
Stock repurchase program authorized amount			$ 20,000,000
Number of shares repurchased during the period	10,429,305	10,429,305
Price per share	$ 0.21	$ 0.21
Consideration of shares repurchased	$ 2,172,819	$ 2,172,819
American Depositary Shares
TREASURY STOCK
Price per share	$ 3.13	$ 3.13

INCOME TAXES - Movement of Valuation Allowance (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Movement of the valuation allowance
Balance at the beginning of the year	$ 4,000,159	$ 4,888,240	$ 2,931,196
Additions of valuation allowance	2,814,445	1,775,887	2,573,942
Reversals of valuation allowance	(1,628,176)	(2,802,174)
Foreign currency translation adjustment	37,667	138,206	(616,898)
Balance at the end of the year	$ 5,224,095	$ 4,000,159	$ 4,888,240

NET INCOME (LOSS) PER SHARE (Tables)

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Schedule of basic and diluted net income (loss) per share

The following table sets forth the computation of basic and diluted net income (loss) per share for the following years:

	For the years ended December 31,
	2019			2020		2021
	US$			US$		US$
Numerator:
Net income (loss) attributable to ordinary shareholders of UP Fintech Holding Limited		(6,589,431	)		16,064,793		14,690,701
Less:
The dilutive effect arising from the convertible bonds		—			—		2,900,645
Numerator for diluted net income (loss) per ordinary share		(6,589,431	)		16,064,793		11,790,056
Denominator:
Weighted average shares used in calculating net income (loss) per ordinary share
Basic		1,751,784,176			2,117,904,025		2,205,186,257
Effect of dilutive securities:
Dilutive effect of share options		—			25,462,481		17,457,965
Dilutive effect of restricted shares units		—			18,865,819		32,613,976
Dilutive effect of convertible bonds		—			—		80,459,006
Denominator for diluted net income (loss) per ordinary share		1,751,784,176			2,162,232,325		2,335,717,204
Net income (loss) per ordinary share
Basic		(0.00	)		0.01		0.01
Diluted		(0.00	)		0.01		0.01

Schedule of potential ordinary shares outstanding excluded from the computation of diluted net loss per ordinary share

The following table summarizes potential ordinary shares outstanding excluded from the computation of diluted net loss per ordinary share for the year ended December 31, 2019, because their effect is anti-dilutive:

For the year

ended

December 31,2019

Share issuable upon exercise of share options

95,933,244

Share issuable upon exercise of RSUs

28,406,980

SUBSEQUENT EVENT

12 Months Ended

Dec. 31, 2021

Subsequent Events [Abstract]

SUBSEQUENT EVENT

23.	SUBSEQUENT EVENT

The Group evaluated events subsequent to the balance sheet date of December 31, 2021 through the date of issuance of the consolidated financial statements. No material recordable or disclosable events or transactions occurred.

COLLATERALIZED TRANSACTIONS

12 Months Ended

Dec. 31, 2021

Collateralized Financings [Abstract]

COLLATERALIZED TRANSACTIONS

16.	COLLATERALIZED TRANSACTIONS

The Group accepted collateral in connection with client margin loans and security borrowing and lending transactions for consolidated account customers. The Group monitors required margin and collateral level on a daily basis in compliance with regulatory and internal guidelines and controls its risk exposure through financial, credit, legal reporting system. Under applicable agreements, customers are required to deposit additional collateral or reduce holding positions, when necessary to avoid forced liquidation of their positions. Pursuant to the authorization obtained from margin clients, the Group further repledges the collaterals to other financial institutions to obtain the funding for the margin transactions.

Margin loans are extended to customers on demand and are not committed facilities. Underlying collateral for margin loans is evaluated with respect to the liquidity of the collateral positions, valuation of securities, volatility analysis and an evaluation of industry concentrations. The Group’s collateral policies minimize the Group’s credit exposure to margin loans in the event of a customer’s default.

For the Group’s securities borrowing and lending transactions which require to deposit cash collateral with the securities lenders and receive the cash collateral from the borrowers, the cash collateral is generally in excess of the market value of the securities borrowed and lent. The Group monitors the market value of securities borrowed and lent on a daily basis, with additional collateral obtained or refunded as permitted contractually.

16.	COLLATERALIZED TRANSACTIONS (Continued)

The following table summarizes the amounts related to collateralized transactions as of December 31, 2020 and 2021:

	As of December 31,
	2020		2021
	US$		US$
Total client margin asset		1,626,260,131		1,759,500,650

Fulfillment of client margin financings		168,840,684		202,004,165
Fulfillment of client short sales		21,492,878		31,612,750
Securities lending to other brokers		434,780,528		392,897,973
Total collateral repledged		625,114,090		626,514,888

SHARE BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2021

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of fair value of the options granted was estimated on the date of grant that prepared by the management with the assistance of an independent third party appraiser, and was determined using a binomial model

	Fair value per ordinary share at grant date⁽¹⁾		Exercise price⁽²⁾		Expected volatility⁽³⁾	Contractual life⁽⁴⁾	Risk-free interest rate⁽⁵⁾	Expected dividend⁽⁶⁾
	US$		US$
Granted in 2014		0.008		0.00001	40%	10 years	3.0-3.1%		0.0
Granted in 2015	0.008-0.016			0.00001	39%	10 years	2.5-3.1%		0.0
Granted in 2016	0.019-0.030			0.00001	39%	10 years	2.3-3%		0.0
Granted in 2017	0.034-0.059		0.00001-0.040		39%	10 years	3.0-3.2%		0.0
Granted in 2018	0.147-0.405		0.0001-0.200		35-38%	10 years	3.1-3.8%		0.0
Granted in 2019	0.274-0.484		0.00001-0.274		37-39%	10 years	3.0-3.4%		0.0
Granted in 2021	0.2184			1.1853	55%	10 years	0.88%		0.0

(1)

(2)	Exercise price. The exercise price of the options was determined by the Company’s Board of Directors.

(3)	Volatility. The volatility of the underlying ordinary shares was estimated based on the historical share price movement of the comparable companies for the period of time close to the expected time to exercise.

(4)	Contractual life. The contractual life of the share options was the period between the grant date and the expiry date.

(5)	Risk free rate. Risk free rate is estimated based on market yield of U.S. Sovereign Curve with maturity close to the share options as of the valuation date, plus country spread.

(6)	Expected dividend. The Company does not expect to declare any dividends in the foreseeable future.

Summary of share option activities

A summary of the Company’s share option activities for the years ended December 31, 2020 and 2021 is presented below:

	Number of share options			Weighted average exercise price		Weighted average remaining contractual life		Aggregate intrinsic value
				US$		Years		US$
Outstanding as of January 1, 2020		95,933,244			0.05223		8.46		17,694,050
Cancelled to grant RSUs		(7,660,000	)		0.27400
Exercised		(16,688,995	)		0.00031
Forfeited		(11,840,000	)		0.09374
Outstanding as of December 31, 2020		59,744,249			0.03005		7.50		29,829,248
Granted		750,000			1.18530
Exercised		(15,767,275	)		0.03322
Forfeited		(370,185	)		0.04544
Outstanding as of December 31, 2021		44,356,789			0.04833		6.77		12,375,711

Schedule of service based RSU

A summary of the Company’s RSU activities for the years ended December 31, 2020 and 2021 is presented below:

	Number of Units			Weighted-Average Grant-Date Fair Value
				US$
Unvested as of January 1, 2020		28,406,980			0.34
Granted		44,179,590			0.23
Cancelled to grant new RSUs		(900,000	)		0.26
Exercised		(449,990	)		0.23
Forfeited		(1,410,000	)		0.20
Unvested as of December 31, 2020		69,826,580			0.28
Granted		21,259,735			0.97
Exercised		(22,237,430	)		0.34
Forfeited		(3,032,440	)		0.34
Unvested as of December 31, 2021		65,816,445			0.48

COLLATERALIZED TRANSACTIONS (Tables)

12 Months Ended

Dec. 31, 2021

Collateralized Financings [Abstract]

Schedule of fair values of client margin asset and security borrowings that were available to utilize as collateral

The following table summarizes the amounts related to collateralized transactions as of December 31, 2020 and 2021:

	As of December 31,
	2020		2021
	US$		US$
Total client margin asset		1,626,260,131		1,759,500,650

Fulfillment of client margin financings		168,840,684		202,004,165
Fulfillment of client short sales		21,492,878		31,612,750
Securities lending to other brokers		434,780,528		392,897,973
Total collateral repledged		625,114,090		626,514,888

ORGANIZATION AND PRINCIPAL ACTIVITIES - The VIE arrangements (Details) - 12 months ended Dec. 31, 2021	$ / shares	¥ / shares
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Standard equity interest purchase price \| (per share)	$ 1.5	¥ 10
Term (in years)	10 years	10 years
Annual service fee (as a percent)	99.00%	99.00%
Term of service agreement (in years)	10 years	10 years

STATUTORY RESERVES AND RESTRICTED NET ASSETS

12 Months Ended

Dec. 31, 2021

Statutory Reserves And Restricted Net Assets [Abstract]

STATUTORY RESERVES AND RESTRICTED NET ASSETS

21.	STATUTORY RESERVES AND RESTRICTED NET ASSETS

In accordance with the PRC laws and regulations, the Group’s subsidiaries located in the PRC, are required to provide for certain statutory reserves. These statutory reserve funds include one or more of the following: (i) a general reserve, (ii) an enterprise expansion fund or discretionary reserve fund, and (iii) a staff bonus and welfare fund. Subject to certain cumulative limits, the general reserve fund requires a minimum annual appropriation of 10% of after‑tax profit (as determined under accounting principles generally accepted in China at each year‑end); the other fund appropriations are at the subsidiaries’ or the affiliated PRC entities’ discretion. These statutory reserve funds can only be used for specific purposes of enterprise expansion, staff bonus and welfare, and are not distributable as cash dividends except in the event of liquidation of Group’s subsidiaries, affiliated PRC entities and their respective subsidiaries. The Group’s subsidiaries are required to allocate at least 10% of their after‑tax profits to the general reserve until such reserve has reached 50% of their respective registered capital. As of December 31, 2018, none of the Group’s PRC subsidiaries has a general reserve that reached 50% of their registered capital threshold. The Group did not made appropriation to these statutory reserve funds due to the loss position of the Group's PRC subsidiaries for the year ended December 31, 2018.

For the year ended December 31, 2019, Beijing U-Tiger Business made appropriation to these statutory reserve funds of US$724,008 due to the profit position, which also reached the maximum required amount of 50% of its registered capital.

For the year ended December 31, 2020, Beijing Yixin made appropriation to these statutory reserve funds of US$1,939,543 due to the profit position, which did not reach the maximum required amount of 50% of its registered capital.

For the year ended December 31, 2021, Beijing Yixin made appropriation to these statutory reserve funds of US$899,337 due to the profit position, which did not reach the maximum required amount of 50% of its registered capital.

Appropriations to the enterprise expansion reserve and the staff welfare and bonus reserve are to be made at the discretion of the Board of Directors of each of the Group’s subsidiaries.

As a result of these PRC laws and regulations and the requirement that distributions by the PRC entities can only be paid out of distributable profits computed in accordance with the PRC GAAP, the PRC entities are restricted from transferring a portion of their net assets to the Group. Amounts restricted include paid‑in capital and the statutory reserves of the Group’s PRC subsidiaries.

The aggregate amounts of capital and statutory reserves restricted which represented the amount of net assets of the relevant subsidiaries in the Group not available for distribution were US$48,315,519 and US$63,908,860 as of December 31, 2020 and 2021, respectively.

Lease - Summary of supplemental information related to operating leases (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Lessee Disclosure [Abstract]
Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows used in operating leases	$ 5,058,078	$ 3,422,191
Non-cash right-of-use assets in exchange for new lease obligations: Operating leases	$ 4,058,759	$ 4,281,660
Weighted average remaining lease term: Operating leases	4 years	3 years
Weighted average discount rate: Operating leases	5.50%	5.30%

RELATED PARTY BALANCES AND TRANSACTIONS - Transactions with related parties (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
RELATED PARTY BALANCES AND TRANSACTIONS
Transactions with related parties	$ 2,860,123
Xiaomi Corporation and its affiliates
RELATED PARTY BALANCES AND TRANSACTIONS
Transactions with related parties		$ (397,590)	$ (517,134)
Alphalion Group Limited
RELATED PARTY BALANCES AND TRANSACTIONS
Transactions with related parties	(94,333)
Transactions with related parties			617,500
Fast Connection Limited
RELATED PARTY BALANCES AND TRANSACTIONS
Transactions with related parties		(700,000)
Guangzhou88 Technology Limited
RELATED PARTY BALANCES AND TRANSACTIONS
Transactions with related parties			(755,524)
Commissions and Interest Income \| Ocean Joy and its subsidiary
RELATED PARTY BALANCES AND TRANSACTIONS
Transaction with related parties	28,350	16,173
Commissions and Interest Income \| Individual directors and executive officers
RELATED PARTY BALANCES AND TRANSACTIONS
Transaction with related parties	138,661	79,949
Execution and clearing fees \| Ocean Joy and its subsidiary
RELATED PARTY BALANCES AND TRANSACTIONS
Transactions with related parties	(686,576)	(51,446)
Execution and clearing fees \| Interactive Brokers
RELATED PARTY BALANCES AND TRANSACTIONS
Transactions with related parties	(16,823,850)	(7,099,254)	(2,102,385)
Commissions, Financing Service Fees, Interest Income and Other Revenues \| Interactive Brokers
RELATED PARTY BALANCES AND TRANSACTIONS
Transaction with related parties	73,293,370	$ 62,704,986	$ 38,089,982
Changes in Fair Value of Convertible Bonds \| Xiaomi Corporation and its affiliates
RELATED PARTY BALANCES AND TRANSACTIONS
Transactions with related parties	2,860,123
Interest Expense of Convertible Bonds \| Xiaomi Corporation and its affiliates
RELATED PARTY BALANCES AND TRANSACTIONS
Transactions with related parties	$ (350,519)

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Tables)

12 Months Ended

Dec. 31, 2021

Accrued Liabilities And Other Liabilities [Abstract]

Summary of accrued expenses and other current liabilities

	As of December 31,
	2020		2021
	US$		US$
Accrued payroll and welfare		12,099,447		14,760,788
Income and non-income based taxes payables		4,936,372		7,156,828
Accrued marketing expenses		6,251,009		3,748,010
Accrued professional expenses		2,471,569		1,749,229
Advanced from customers		429,531		1,748,167
Accrued data and IT service expenses		622,641		1,443,897
Amounts due to employees for sale of their shares exercised under the share incentive plan		—		1,131,614
Others		327,632		2,007,644
Total		27,138,201		33,746,177

PROPERTY, EQUIPMENT AND INTANGIBLE ASSETS, NET (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Equipment and Intangible Assets [Line Items]
Less: accumulated depreciation	$ (2,661,241)	$ (1,252,714)
Property and equipment, net	5,142,643	1,628,799
Intangible assets, net	8,889,009	8,064,235
Less: accumulated amortization	(44,620)	(28,086)
Property, equipment and intangible assets, net	14,031,652	9,693,034
Depreciation and amortization expenses	1,338,968	928,414	$ 752,167
Licenses
Property, Equipment and Intangible Assets [Line Items]
Intangible assets, net	8,677,136	7,967,036
Trading Right
Property, Equipment and Intangible Assets [Line Items]
Intangible assets, net	128,212
Electronic Equipment
Property, Equipment and Intangible Assets [Line Items]
Property and equipment, gross	6,292,614	2,385,263
Office Equipment
Property, Equipment and Intangible Assets [Line Items]
Property and equipment, gross	391,223	235,894
Leasehold improvement
Property, Equipment and Intangible Assets [Line Items]
Property and equipment, gross	752,194	100,417
Software
Property, Equipment and Intangible Assets [Line Items]
Property and equipment, gross	367,853	159,939
Trademark
Property, Equipment and Intangible Assets [Line Items]
Intangible assets, net	$ 128,281	$ 125,285

INCOME TAXES - Components of profit (loss) before income taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
(Loss) income before income taxes - PRC	$ 21,320,470	$ 20,551,832	$ 6,117,021
(Loss) income before income taxes	19,054,472	22,029,792	(9,305,224)
The Cayman Islands
(Loss) income before income taxes - Foreign	2,442,082	(1,302,817)	946,035
International
(Loss) income before income taxes - Foreign	$ (4,708,080)	$ 2,780,777	$ (16,368,280)

- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8906-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8933-108599

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=123384075&loc=d3e41242-110953

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(10))
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(8))
-URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 235
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-05(b)(2))
-URI http://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884

Reference 9: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8924-108599

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(15))
-URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

+ Details

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based compensation	$ 13,370,377	$ 6,054,612	$ 4,062,600
Unrealized gain on available for sale investments, tax	0	6,284	$ 0
Interest expense, related parties	(13,938,263)	(9,316,150)
Execution and clearing, related party	(17,510,426)	(7,150,700)
Communication and market data, related party	(94,333)
Marketing and branding, related parties		(397,590)
General and administrative, related parties		(700,000)
Fair value change from convertible bonds	2,860,123
Commissions
Revenues from related parties	30,446,244	35,559,807
Financing service fees
Revenues from related parties	9,268,819	6,576,622
Interest income
Revenues from related parties	31,776,764	21,966,305
Other revenues
Revenues from related parties	$ 15,556,298	$ 8,014,524

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES

12 Months Ended

Dec. 31, 2021

Accrued Liabilities And Other Liabilities [Abstract]

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES

7.	ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES

Accrued expenses and other current liabilities consisted of the following:

	As of December 31,
	2020		2021
	US$		US$
Accrued payroll and welfare		12,099,447		14,760,788
Income and non-income based taxes payables		4,936,372		7,156,828
Accrued marketing expenses		6,251,009		3,748,010
Accrued professional expenses		2,471,569		1,749,229
Advanced from customers		429,531		1,748,167
Accrued data and IT service expenses		622,641		1,443,897
Amounts due to employees for sale of their shares exercised under the share incentive plan		—		1,131,614
Others		327,632		2,007,644
Total		27,138,201		33,746,177

COMMITMENTS AND CONTINGENCY

12 Months Ended

Dec. 31, 2021

Commitments And Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCY

18.	COMMITMENTS AND CONTINGENCY

The Company did not have any significant capital or other commitments, long-term obligations, or guarantees as of December 31, 2021.

FAIR VALUE MEASUREMENT (Tables)

12 Months Ended

Dec. 31, 2021

Fair Value Disclosures [Abstract]

Schedule of fair value measurements of the Group's assets that were measured at fair value on a recurring basis

As of December 31, 2020 and 2021, information about inputs for the fair value measurements of the Group’s assets that were measured at fair value on a recurring basis in periods subsequent to their initial recognition is as follows:

	As of December 31, 2020
	Quoted prices in active markets for identical instruments (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (level 3)		Total balance
	US$		US$		US$		US$
Financial instruments held, at fair value
Funds		283,764		—		—		283,764
Corporate bonds		263,750		—		—		263,750
Stock		15,022		—		—		15,022
Long‑term available-for-sale securities		—		—		3,924,051		3,924,051
Total		562,536		—		3,924,051		4,486,587

	As of December 31, 2021
	Quoted prices in active markets for identical instruments (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (level 3)		Total balance
	US$		US$		US$		US$
Financial instruments held, at fair value
Funds		419,503		—		1,971,872		2,391,375
Stock		1,498,706		—		—		1,498,706
Derivative		—		12,906		—		12,906
Long‑term available-for-sale securities		—		—		5,842,883		5,842,883
Total		1,918,209		12,906		7,814,755		9,745,870

Schedule of movements of Level 3 fair value measurements

The movements of Level 3 fair value measurements for the years ended December 31, 2020 and 2021 are as follows:

	US$
As of January 1, 2020		3,980,806
Additions during the year		—
Net unrealized gains		41,149
Impairment		(150,978	)
Foreign currency translation adjustment		53,074
As of December 31, 2020		3,924,051
Additions during the year		1,000,000
Net unrealized gains		2,871,477
Impairment		—
Foreign currency translation adjustment		19,227
As of December 31, 2021		7,814,755

NET INCOME (LOSS) PER SHARE - Antidilutive securities (Details)	12 Months Ended
	Dec. 31, 2019 shares
Share options
Antidilutive securities excluded from computation of earnings per share
Antidilutive securities excluded from computation of earnings per share	95,933,244
Restricted Share Units ("RSUs")
Antidilutive securities excluded from computation of earnings per share
Antidilutive securities excluded from computation of earnings per share	28,406,980

FAIR VALUE MEASUREMENT - Measured at fair value on a non recurring basis (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Impairment loss as an offset to other income	$ 600,000		$ 755,524
Impairment loss on other intangible assets arising from acquisitions	0	$ 0
Impairment loss on goodwill	$ 0	$ 0	$ 0

SHARE BASED COMPENSATION (Details) - shares	1 Months Ended		12 Months Ended
SHARE BASED COMPENSATION (Details) - shares	Sep. 30, 2021	Mar. 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Aug. 31, 2021	Dec. 20, 2020	Dec. 31, 2019	Dec. 31, 2018	Jun. 30, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Maximum aggregate number of shares that may be issued								254,697,314	187,697,314
Class A ordinary shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares issued	36,534,437	237,375,000
2019 Performance Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Maximum aggregate number of shares that may be issued					98,963,742	62,429,305	52,000,000
Aggregate number of shares increased for issuance				10,429,305
Aggregate number of outstanding shares	62,429,305
Share options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Aggregate number of outstanding shares			44,356,789	59,744,249			95,933,244
Term of option			10 years
Percentage of fair market value as of the latest practicable date upon termination for death, disability or retirement of employees			50.00%
Threshold period for vesting or exercising option upon termination for death, disability or retirement, the employees			6 months
Percentage of fair market value as of the latest practicable date upon other termination			30.00%
Threshold period for vesting or exercising option upon other termination			6 months
Share options \| Vested and exercisable on second anniversary
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage			50.00%
Share options \| Vested and exercisable on third anniversary
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage			25.00%
Share options \| Vested and exercisable on fourth anniversary
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage			25.00%

CONVERTIBLE BOND PAYABLE (Details) - USD ($) $ in Millions				12 Months Ended
CONVERTIBLE BOND PAYABLE (Details) - USD ($) $ in Millions	May 05, 2021	Apr. 12, 2021	Feb. 25, 2021	Dec. 31, 2021
2021 Series A1 Note US$ 44,000,000 1.00% due to 2026
Debt Instrument [Line Items]
Aggregate principal amount			$ 44
Convertible notes maturity year			2026	2026
Convertible notes interest rate percentage			1.00%
Effective interest rate			5.40%
Convertible notes interest rate percentage				1.00%
2021 Series A2 Note US$ 21,000,000 1.00% due to 2026
Debt Instrument [Line Items]
Aggregate principal amount	$ 21
Convertible notes maturity year	2026			2026
Convertible notes interest rate percentage	1.00%			1.00%
2021 Series B Note US$ 90,000,000 1.00% due to 2026
Debt Instrument [Line Items]
Aggregate principal amount		$ 90
Convertible notes maturity year		2026		2026
Convertible notes interest rate percentage		1.00%		1.00%

INCOME TAXES - Current and deferred portions of income taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Current tax expense	$ 5,026,081	$ 1,077,877	$ 2,859,774
Deferred tax expense (benefit)	(662,310)	1,772,670	(6,215,140)
Income tax expense (benefit)	$ 4,363,771	$ 2,850,547	$ (3,355,366)

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details

INCOME TAXES - Additional information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure
Net operating loss carryforwards	$ 83,597,429	$ 64,430,676
Deferred tax assets valuation allowance	5,224,095	4,000,159	$ 4,888,240	$ 2,931,196
Valuation allowance for Operating loss carryforwards	27,152,139	20,695,157
Operating loss carryforwards	4,607,181
Deferred tax assets valuation allowance, increase amount	475,079
Deferred tax assets valuation allowance, decrease amount	405,767
Utilization of deferred tax assets	171,363
Expected Utilization Prior To Expiration
Income Tax Disclosure
Net operating loss carryforwards	56,445,290	43,735,519
Valuation Allowance, Net Operating Loss Carryforwards
Income Tax Disclosure
Deferred tax assets valuation allowance	$ 4,614,648	$ 3,867,639
USA
Income Tax Disclosure
Term of operating loss carryforward (in years)	5 years
PRC
Income Tax Disclosure
Term of operating loss carryforward (in years)	10 years

FAIR VALUE MEASUREMENT

12 Months Ended

Dec. 31, 2021

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENT

11.	FAIR VALUE MEASUREMENT

Measured at fair value on a recurring basis

The Company measures financial instruments held, at fair value and long-term available-for-sale securities on a recurring basis.

The fair value of the Company’s financial instruments held, at fair value are determined based on the quoted market price (Level 1). The Company’s derivatives are classified as Level 2 of the fair value hierarchy since inputs to their valuation can be generally corroborated by market data.

The Group measured the fair value of its long-term available-for-sale securities using market approach and discounted cash flow approach and considered those as Level 3 measurement because the Group used unobservable inputs to determine their fair values. As of December 31, 2020 and 2021, recent transaction price was used of market approach and discounted cash flow approach. The unobservable inputs were discounts for lack of marketability for such market approach and discount rates for discounted cash flow approach as of December 31, 2020 and 2021. Significant increases or decreases in any of those inputs in isolation would result in a significant change in fair value measurement.

11.	FAIR VALUE MEASUREMENT (Continued)

Measured at fair value on a recurring basis (Continued)

	As of December 31, 2020
	Quoted prices in active markets for identical instruments (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (level 3)		Total balance
	US$		US$		US$		US$
Financial instruments held, at fair value
Funds		283,764		—		—		283,764
Corporate bonds		263,750		—		—		263,750
Stock		15,022		—		—		15,022
Long‑term available-for-sale securities		—		—		3,924,051		3,924,051
Total		562,536		—		3,924,051		4,486,587

	As of December 31, 2021
	Quoted prices in active markets for identical instruments (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (level 3)		Total balance
	US$		US$		US$		US$
Financial instruments held, at fair value
Funds		419,503		—		1,971,872		2,391,375
Stock		1,498,706		—		—		1,498,706
Derivative		—		12,906		—		12,906
Long‑term available-for-sale securities		—		—		5,842,883		5,842,883
Total		1,918,209		12,906		7,814,755		9,745,870

During the years ended December 31, 2020 and 2021, there were no transfers between level 1, level 2 and level 3 categories.

11.	FAIR VALUE MEASUREMENT (Continued)

Measured at fair value on a recurring basis(Continued)

The movements of Level 3 fair value measurements for the years ended December 31, 2020 and 2021 are as follows:

	US$
As of January 1, 2020		3,980,806
Additions during the year		—
Net unrealized gains		41,149
Impairment		(150,978	)
Foreign currency translation adjustment		53,074
As of December 31, 2020		3,924,051
Additions during the year		1,000,000
Net unrealized gains		2,871,477
Impairment		—
Foreign currency translation adjustment		19,227
As of December 31, 2021		7,814,755

For the year ended December 31, 2020, the unrealized gains included US$41,149 recognized in other comprehensive income (loss) in the consolidated statements of comprehensive income (loss). For the year ended December 31, 2021, the unrealized gains included US$1,899,605 recognized in other comprehensive income (loss) in the consolidated statements of comprehensive income (loss), and US$971,872 recognized in other income in the consolidated statements of comprehensive income (loss).The Group recognized nil, US$150,978 and nil impairment loss related to the long-term available-for-sale securities as an offset of other income for the years ended December 31, 2019, 2020 and 2021.

Measured at fair value on a non‑recurring basis

The Group measures the equity securities without readily determinable fair value at fair value on a nonrecurring basis whenever there is an impairment indicator or any changes resulting from observable price changes in orderly transactions for the identical or a similar investment of the same issuer. The Group recognized US$755,524, nil and US$600,000 impairment loss related to the long-term equity securities without readily determinable fair value in other income for the years ended December 31, 2019, 2020 and 2021.

The Group measured the value of its share options and restricted share units granted to employees and management at fair value to determine the share based compensation expenses on each of the grant date. The fair value was determined using models with significant unobservable inputs (Level 3 inputs). Key inputs and parameters primarily include risk-free interest rate, expected stock price volatility, dividend yields, expected term, and forfeiture rates.

The Group measures goodwill at fair value on a nonrecurring basis and performs a goodwill impairment test annually or more often if event occur or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carry amount. The Group measured acquired intangible assets using the income approach‑discounted cash flow method when events or changes in circumstances indicate that the carrying amount of an asset may no longer be recoverable. The Group did not recognize any impairment loss related to other intangible assets arising from acquisitions during the years ended December 31, 2020 and 2021. The fair value of goodwill is determined using discounted cash flows, and an impairment loss will be recognized for any excess in the carrying value of goodwill over the implied fair value of goodwill. The Group did not recognize any impairment loss related to goodwill during the years ended December 31, 2020 and 2021. Key inputs and parameters primarily for the above impairment assessment include significant judgment and estimates by the management on future earnings, and discount rate.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

RELATED PARTY BALANCES AND TRANSACTIONS (Parenthetical) (Details)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2020 HKD ($)
RELATED PARTY BALANCES AND TRANSACTIONS
Amounts due from related parties	$ 2,947,871	$ 5,065,222
Ocean Joy Holdings Limited ("Ocean Joy")
RELATED PARTY BALANCES AND TRANSACTIONS
Amounts due from related parties		386,940	$ 3,000,000
Ocean Joy Securities Limited
RELATED PARTY BALANCES AND TRANSACTIONS
Amounts due from related parties		$ 657,798	$ 5,100,000

- Definition

The aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due within one year (or one business cycle).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(C))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iv))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iv))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(5))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442552-122756

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(11))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iii)(B))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3)(a)(2))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(5))
-URI http://asc.fasb.org/extlink&oid=124359900&loc=SL124442526-122756

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765

Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(k)(1))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

ORDINARY SHARES (Details)		1 Months Ended							12 Months Ended
ORDINARY SHARES (Details)	Jun. 10, 2021 USD ($) shares	Dec. 31, 2021 $ / shares shares	Sep. 30, 2021 shares	Aug. 31, 2021 shares	Mar. 31, 2021 shares	Apr. 30, 2019 $ / shares shares	Mar. 31, 2019 USD ($) shares	Nov. 30, 2018 shares	Dec. 31, 2021 $ / shares shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2020 $ / shares shares	Dec. 31, 2018 shares	Jun. 30, 2018 shares	Jun. 07, 2018 shares
Class Of Stock [Line Items]
Net proceeds received from initial public offering \| $										$ 114,765,901
Price per share \| $ / shares		$ 0.21							$ 0.21		$ 0.21
Class A ordinary shares
Class Of Stock [Line Items]
Common stock, shares authorized (in shares)		4,662,388,278							4,662,388,278		4,662,388,278
Par value per share (in dollars per share) \| $ / shares		$ 0.00001							$ 0.00001
Votes per share (in votes)									one
Common stock, shares issued (in shares)		2,059,987,139							2,059,987,139	1,777,218,449	1,794,357,434	216,546,541	2,480,000
Common stock, shares outstanding (in shares)		2,059,987,139							2,059,987,139	1,777,218,449	1,794,357,434	216,546,541
Number of shares issued in conversion (in shares)						1,210,906,902		180,895,573
Net proceeds received from initial public offering \| $							$ 114,765,901
Shares issued during the period (in shares)			36,534,437				237,375,000
ADS issued during period							15,825,000
Conversion ratio						1
Price per share \| $ / shares						$ 8.00
Class A ordinary shares \| IPO
Class Of Stock [Line Items]
Common stock, shares issued (in shares)														33,170,968
Common stock, shares outstanding (in shares)														33,170,968
Shares issued during the period (in shares)	112,125,000
Consideration received \| $	$ 175,400,000
Class A ordinary shares \| Private placement
Class Of Stock [Line Items]
Shares issued during the period (in shares)							13,125,000
Class A ordinary shares \| Over allotment option
Class Of Stock [Line Items]
Shares issued during the period (in shares)							29,250,000
Class B ordinary shares
Class Of Stock [Line Items]
Common stock, shares authorized (in shares)		337,611,722							337,611,722		337,611,722
Par value per share (in dollars per share) \| $ / shares		$ 0.00001							$ 0.00001
Votes per share (in votes)									twenty
Number of Class A Ordinary Shares issued for each share converted									1
Common stock, shares issued (in shares)		222,111,722							222,111,722	337,611,722	337,611,722	337,611,722	107,863,347
Common stock, shares outstanding (in shares)		222,111,722							222,111,722	337,611,722	337,611,722	337,611,722
Number of shares converted		48,000,000		45,000,000	22,500,000
Class B ordinary shares \| IPO
Class Of Stock [Line Items]
Common stock, shares issued (in shares)														410,643,948
Common stock, shares outstanding (in shares)														410,643,948
Series Angel, A, B-1, B-2, B-3 and C \| IPO
Class Of Stock [Line Items]
Number of shares converted						1,210,906,902
Series C-1 convertible redeemable preferred shares
Class Of Stock [Line Items]
Number of shares issued in conversion (in shares)						18,612,084
Number of shares converted						18,597,738
Price per share \| $ / shares						$ 8.00

SHARE BASED COMPENSATION - Fair value of options granted (Details) - Share options - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair value per ordinary share at grant date	$ 0.2184						$ 0.008
Exercise price	$ 1.1853				$ 0.00001	$ 0.00001	$ 0.00001
Expected volatility	55.00%			39.00%	39.00%	39.00%	40.00%
Contractual life	10 years	10 years	10 years	10 years	10 years	10 years	10 years
Risk free interest rate	0.88%
Expected dividend	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair value per ordinary share at grant date		$ 0.274	$ 0.147	$ 0.034	$ 0.019	$ 0.008
Exercise price		$ 0.00001	$ 0.0001	$ 0.00001
Expected volatility		37.00%	35.00%
Risk free interest rate		3.00%	3.10%	3.00%	2.30%	2.50%	3.00%
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Fair value per ordinary share at grant date		$ 0.484	$ 0.405	$ 0.059	$ 0.030	$ 0.016
Exercise price		$ 0.274	$ 0.200	$ 0.040
Expected volatility		39.00%	38.00%
Risk free interest rate		3.40%	3.80%	3.20%	3.00%	3.10%	3.10%

PROPERTY, EQUIPMENT AND INTANGIBLE ASSETS, NET (Tables)

12 Months Ended

Dec. 31, 2021

Property Equipment And Intangible Assets [Abstract]

Summary of property, equipment and intangible assets, net

	As of December 31,
	2020			2021
	US$			US$
Electronic Equipment		2,385,263			6,292,614
Office Equipment		235,894			391,223
Leasehold improvement		100,417			752,194
Software		159,939			367,853
Less: accumulated depreciation		(1,252,714	)		(2,661,241	)
Property and equipment, net		1,628,799			5,142,643
Licenses		7,967,036			8,677,136
Trademark		125,285			128,281
Trading right		—			128,212
Less: accumulated amortization		(28,086	)		(44,620	)
Intangible assets, net		8,064,235			8,889,009
Total		9,693,034			14,031,652

Summary of Estimated Amortization Expenses for Intangible Assets

The estimated amortization expenses for the above intangible assets for future years are as follows:

Years ending December 31,	Amortization for Intangible Assets
	US$
2022		16,732
2023		16,732
2024		16,732
2025		16,732
2026		16,732
Total		83,660

LONG TERM INVESTMENTS - Available for sale investments - (Details)	1 Months Ended			12 Months Ended
	Feb. 28, 2019 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2017 CNY (¥)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Schedule Of Available For Sale Securities [Line Items]
Long-term available-for-sale investments				$ 5,842,883	$ 3,924,051
Unrealized gain on available-for-sale securities				1,899,605	41,149
Beijing Yingxin Network Technology Co., LTD ("Yingxin")
Schedule Of Available For Sale Securities [Line Items]
Long-term available-for-sale investments				823,165	803,938
Alphalion Technology Holding Limited ("Alphalion")
Schedule Of Available For Sale Securities [Line Items]
Long-term available-for-sale investments	$ 3,060,113			5,019,718	3,120,113
Percentage of equity interest acquired	25.00%
Fair value change recorded				1,899,605	60,000
Beijing Yingxin Network Technology Co., LTD ("Yingxin")
Schedule Of Available For Sale Securities [Line Items]
Percentage of equity interest acquired		2.91%	2.91%
Purchase consideration		$ 461,092	¥ 3,000,000
Unrealized gain on available-for-sale securities				$ 0	$ 0	$ 0

REGULATORY REQUIREMENT (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
REGULATORY REQUIREMENT
Net Capital	$ 233,954,515	$ 94,899,679
Requirement	17,361,909	37,141,128
Excess Net Capital	$ 216,592,606	$ 57,758,551

PREPAID EXPENSES AND OTHER CURRENT ASSETS

12 Months Ended

Dec. 31, 2021

Prepaid Expense And Other Assets Current [Abstract]

PREPAID EXPENSES AND OTHER CURRENT ASSETS

3.	PREPAID EXPENSES AND OTHER CURRENT ASSETS

Prepaid expenses and other currents assets consisted of the following:

	As of December 31,
	2020		2021
	US$		US$
IPO distribution service and promotional and advertisement service receivables		5,360,831		3,588,851
Prepaid data and IT service expenses		1,315,469		2,226,216
Prepaid income taxes		—		1,978,308
Rental and other deposits		391,625		1,885,272
Advances to employees		825,682		1,458,582
Prepaid professional service fees		998,235		1,225,020
Prepaid marketing expenses		402,724		1,073,965
Wealth management service fees receivables		—		727,209
Input VAT receivables		1,174,934		529,985
Interest receivables from term deposits		429,454		117,392
Others		315,476		1,240,823
Total		11,214,430		16,051,623

GOODWILL - Additional Information (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Accumulated goodwill impairment	$ 0	$ 0

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Acquisition (Details)			1 Months Ended			2 Months Ended	12 Months Ended
	Oct. 26, 2021 USD ($)	Oct. 26, 2021 HKD ($)	May 31, 2020 USD ($)	May 31, 2020 HKD ($)	Jul. 31, 2019 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Oct. 27, 2021	Oct. 26, 2021 HKD ($)
Restructuring Cost And Reserve [Line Items]
Payment for a business acquisition							$ 1,079,830		$ 6,348,290
Revenues							$ 264,488,162	$ 138,496,690	$ 58,662,900
TradeUp Securities
Restructuring Cost And Reserve [Line Items]
Equity interest acquired (as a percentage)					100.00%
Business Combination, Consideration Transferred, Total					$ 9,348,290
Payment for a business acquisition					6,348,290
Business Combination, Consideration Transferred, Equity Interests Issued					$ 3,000,000
Maximum percentage of acquired entity revenue combined in consolidated financial statements									1.00%
Maximum percentage of acquired entity assets combined in consolidated financial statements									4.10%
Business Combination, Acquisition Related Costs									$ 377,239
Ocean Joy Holdings Limited ("Ocean Joy")
Restructuring Cost And Reserve [Line Items]
Equity interest acquired (as a percentage)	70.00%		30.00%	30.00%						100.00%	70.00%
Business Combination, Consideration Transferred, Total	$ 1,079,830	$ 8,400,000	$ 462,276	$ 3,600,000
Maximum percentage of acquired entity revenue combined in consolidated financial statements							0.10%
Maximum percentage of acquired entity assets combined in consolidated financial statements							2.20%
Business Combination, Acquisition Related Costs							$ 11,736
Business combination, acquired receivable	$ 1,426,919										$ 11,100,000
Equity interest acquired, step acquisition (as a percentage)	70.00%										70.00%
Business combination, step acquisition fair value of equity interests	$ 462,784	$ 3,600,000
Business combination, step acquisition, equity interest gain	$ 77,593
Revenues						$ 213,895
Net income (loss)						$ 73,273

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Cash Segregated for Regulatory Purposes (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Cash-segregated for regulatory purposes	$ 433,540,023	$ 29,625,645

LONG TERM INVESTMENTS (Tables)

12 Months Ended

Dec. 31, 2021

Long Term Investments [Abstract]

Summary of equity securities without readily determinable fair value

The Group had the following equity securities without readily determinable fair value:

	As of December 31,
	2020		2021
	US$		US$
TradeUP Acquisition Corp.("UPTDU")⁽^a)		—		445,400
Fortune Rise Acquisition Corporation ("FRLAU")⁽^b)		—		201,248
Shenzhen Guru Club Information Technology Group Co., LTD. ("Guru")⁽^c)		1,532,567		1,569,218
Shanghai Realize Investment Consulting Co., Ltd. ("Realize")⁽^d)		—		941,531
Shanghai Yisong Consulting Management Co., LTD ("Yisong")⁽^e)		—		407,997
UNext Group Limited ("UNext")⁽^f)		600,000		—
Total		2,132,567		3,565,394

(a)

(b)

(c)

(d)

6.	LONG‑TERM INVESTMENTS (Continued)

Equity securities without readily determinable fair value (Continued)

(e)

(f)

Summary of available for sale investments

The Group had the following available‑for‑sale securities:

	As of December 31,
	2020		2021
	US$		US$
Beijing Yingxin Network Technology Co., LTD ("Yingxin")⁽^g)		803,938		823,165
Alphalion Technology Holding Limited ("Alphalion")^(h)		3,120,113		5,019,718
Total		3,924,051		5,842,883

(g)

(h)

Summary of equity method investment

The Group had the following Equity method investments:

	As of December 31,
	2020		2021
	US$		US$
Ocean Joy Holdings Limited ("Ocean Joy") ⁽ⁱ⁾		424,333		—
TradeUP Global Sponsor LLC ("Global Sponsor") ^(j)		—		369,567
Total		424,333		369,567

(i)

(j)

Treasury Stock

12 Months Ended

Dec. 31, 2021

Treasury Stock [Abstract]

TREASURY STOCK

14.	TREASURY STOCK

On March 25, 2020, the Company’s Board of Directors approved a share repurchase program. Under the terms of the approved program (“Share Repurchase Program”), the Company may repurchase US$20 million worth of its outstanding ADSs from time to time for a period not to exceed twelve months. As of December 31, 2020 and 2021, the Company had repurchased an aggregate of 10,429,305 ordinary shares under the Share Repurchase Program in the open market, at an average price of US$3.13 per ADS, or US$0.21 per share for a total consideration of US$2.2 million.

ORDINARY SHARES

12 Months Ended

Dec. 31, 2021

Common Stock Number Of Shares Par Value And Other Disclosures [Abstract]

ORDINARY SHARES

10.	ORDINARY SHARES

The Company’s Amended and Restated Memorandum of Association authorizes the Company to issue 4,662,388,278 Class A ordinary shares and 337,611,722 Class B ordinary shares with a par value of US$0.00001 per share. The shareholders of Class A ordinary shares and Class B ordinary shares have the same rights except for the voting and conversion rights. Each Class A ordinary share is entitled to one vote and is not convertible into Class B ordinary share under any circumstance; and each Class B ordinary share is entitled to twenty votes and will be automatically converted into one Class A ordinary share under certain circumstances.

As of June 7, 2018, upon the Re-domiciliation described in Note 1, the Company had 33,170,968 Class A ordinary shares and 410,643,948 Class B ordinary shares issued and outstanding, respectively. In June 2018, the Company further issued 2,480,000 Class A ordinary shares and 107,863,347 Class B ordinary shares. In November 2018, 180,895,573 Class B ordinary shares were redesignated into Class A ordinary shares. As of December 31, 2018, the Company had 216,546,541 Class A ordinary shares and 337,611,722 Class B ordinary shares issued and outstanding, respectively.

In March 2019, the Group completed its initial public offering and received net proceeds of US$114,765,901, the Company newly issued 237,375,000 Class A ordinary shares (representing 15,825,000 ADSs), including 13,125,000 Class A ordinary shares issued through a private placement from an existing shareholder, IB Global Investment LLC, an affiliate of Interactive Brokers, and 29,250,000 Class A ordinary shares issued from exercising the over-allotment option by the underwriters.

Upon the completion of the initial public offering, 1,210,906,902 outstanding Series Angel, A, B-1, B-2, B-3 and C preferred shares were converted into 1,210,906,902 Class A ordinary shares on a one-for-one basis, and 18,597,738 outstanding Series C-1 preferred shares were converted into 18,612,084 Class A ordinary shares, reflecting the anti-dilution adjustments to the conversion rate based on the initial public offering price of US$8.00 per ADS.

As of December 31, 2019, the Company had 1,777,218,449 Class A ordinary shares and 337,611,722 Class B ordinary shares issued and outstanding, respectively.

As of December 31, 2020, the Company had 1,794,357,434 Class A ordinary shares and 337,611,722 Class B ordinary shares issued and outstanding, respectively.

On June 10, 2021, the Company completed a follow-on public offering, issued 112,125,000 Class A ordinary shares for a total consideration of US$175.4 million after deducting the underwriting discounts and commissions and offering expenses.

In March, August and December 2021, 22,500,000, 45,000,000 and 48,000,000 Class B ordinary shares were converted into Class A ordinary shares, respectively.

As of December 31, 2021, the Company had 2,059,987,139 Class A ordinary shares and 222,111,722 Class B ordinary shares issued and outstanding, respectively.

GOODWILL

12 Months Ended

Dec. 31, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

GOODWILL

The changes in the carrying amount of goodwill for the years ended December 31, 2020 and 2021 are as follows:

	For the years ended,
	2020		2021
	US$		US$
Balance at the beginning of year		2,421,403		2,421,403
Increase in goodwill related to acquisitions during the year (Note 2)	—			71,265
Impairment loss	—		—
Balance at the end of year		2,421,403		2,492,668

As of December 31, 2020 and 2021, there had not been any accumulated goodwill impairment provided.

PROPERTY, EQUIPMENT AND INTANGIBLE ASSETS, NET

12 Months Ended

Dec. 31, 2021

Property Equipment And Intangible Assets [Abstract]

PROPERTY, EQUIPMENT AND INTANGIBLE ASSETS, NET

4.	PROPERTY, EQUIPMENT AND INTANGIBLE ASSETS, NET

Property, equipment and intangible assets, net, consisted of the following:

	As of December 31,
	2020			2021
	US$			US$
Electronic Equipment		2,385,263			6,292,614
Office Equipment		235,894			391,223
Leasehold improvement		100,417			752,194
Software		159,939			367,853
Less: accumulated depreciation		(1,252,714	)		(2,661,241	)
Property and equipment, net		1,628,799			5,142,643
Licenses		7,967,036			8,677,136
Trademark		125,285			128,281
Trading right		—			128,212
Less: accumulated amortization		(28,086	)		(44,620	)
Intangible assets, net		8,064,235			8,889,009
Total		9,693,034			14,031,652

Depreciation and amortization expenses for the years ended December 31, 2019, 2020 and 2021 were US$752,167, US$928,414 and US$1,338,968, respectively. The estimated amortization expenses for the above intangible assets for future years are as follows:

Years ending December 31,	Amortization for Intangible Assets
	US$
2022		16,732
2023		16,732
2024		16,732
2025		16,732
2026		16,732
Total		83,660

CONVERTIBLE BOND PAYABLE - Summary of Convertible Bonds Payable (Parenthetical) (Details) - USD ($)				12 Months Ended
	May 05, 2021	Apr. 12, 2021	Feb. 25, 2021	Dec. 31, 2021
2021 Series A1 Note US$ 44,000,000 1.00% due to 2026
Debt Instrument [Line Items]
Convertible notes face amount				$ 44,000,000
Convertible notes interest rate percentage				1.00%
Convertible notes maturity year			2026	2026
2021 Series A2 Note US$ 21,000,000 1.00% due to 2026
Debt Instrument [Line Items]
Convertible notes face amount				$ 21,000,000
Convertible notes interest rate percentage	1.00%			1.00%
Convertible notes maturity year	2026			2026
2021 Series B Note US$ 90,000,000 1.00% due to 2026
Debt Instrument [Line Items]
Convertible notes face amount				$ 90,000,000
Convertible notes interest rate percentage		1.00%		1.00%
Convertible notes maturity year		2026		2026

FAIR VALUE MEASUREMENT - Measured at fair value on a recurring basis (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments held, at fair value	$ 3,902,987	$ 562,536
Long-term available-for-sale investments	5,842,883	3,924,051
Fair value assets transferred from level 1 to level 2	0
Fair value assets transferred from level 2 to level 1	0
Fair value liabilities transferred from level 1 to level 2	0
Fair value liabilities transferred from level 2 to level 1	0
Fair value assets transferred into level 3	0
Fair value assets transferred out of level 3	0
Fair value liabilities transferred into level 3	0
Fair value liabilities transferred out of level 3	0
Impairment loss related to long-term available-for-sale securities		150,978
Other Comprehensive Income (Loss)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized gain	1,899,605	41,149
Other Income
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized gain	971,872
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative	12,906
Long-term available-for-sale investments	5,842,883	3,924,051
Total	9,745,870	4,486,587
Recurring \| Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments held, at fair value	2,391,375	283,764
Recurring \| Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments held, at fair value		263,750
Recurring \| Stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments held, at fair value	1,498,706	15,022
Recurring \| Quoted prices in active markets for identical instruments (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total	1,918,209	562,536
Recurring \| Quoted prices in active markets for identical instruments (Level 1) \| Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments held, at fair value	419,503	283,764
Recurring \| Quoted prices in active markets for identical instruments (Level 1) \| Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments held, at fair value		263,750
Recurring \| Quoted prices in active markets for identical instruments (Level 1) \| Stocks
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments held, at fair value	1,498,706	15,022
Recurring \| Significant other observable inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative	12,906
Total	12,906
Recurring \| Significant unobservable inputs (level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term available-for-sale investments	5,842,883	3,924,051
Total	7,814,755	$ 3,924,051
Recurring \| Significant unobservable inputs (level 3) \| Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial instruments held, at fair value	$ 1,971,872

CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (DEFICIT) (Parenthetical)	12 Months Ended
	Dec. 31, 2019 USD ($)
Statement Of Stockholders Equity [Abstract]
Offering costs	$ 3,462,099

NET INCOME (LOSS) PER SHARE

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

NET INCOME (LOSS) PER SHARE

13.	NET INCOME (LOSS) PER SHARE

The following table sets forth the computation of basic and diluted net income (loss) per share for the following years:

	For the years ended December 31,
	2019			2020		2021
	US$			US$		US$
Numerator:
Net income (loss) attributable to ordinary shareholders of UP Fintech Holding Limited		(6,589,431	)		16,064,793		14,690,701
Less:
The dilutive effect arising from the convertible bonds		—			—		2,900,645
Numerator for diluted net income (loss) per ordinary share		(6,589,431	)		16,064,793		11,790,056
Denominator:
Weighted average shares used in calculating net income (loss) per ordinary share
Basic		1,751,784,176			2,117,904,025		2,205,186,257
Effect of dilutive securities:
Dilutive effect of share options		—			25,462,481		17,457,965
Dilutive effect of restricted shares units		—			18,865,819		32,613,976
Dilutive effect of convertible bonds		—			—		80,459,006
Denominator for diluted net income (loss) per ordinary share		1,751,784,176			2,162,232,325		2,335,717,204
Net income (loss) per ordinary share
Basic		(0.00	)		0.01		0.01
Diluted		(0.00	)		0.01		0.01

For the year

ended

December 31,2019

Share issuable upon exercise of share options

95,933,244

Share issuable upon exercise of RSUs

28,406,980

ORGANIZATION AND PRINCIPAL ACTIVITIES - Assets, liabilities, results of operations and cash flows of the VIEs (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Variable Interest Entity [Line Items]
Current assets	$ 3,271,271,527	$ 2,152,221,987
Total assets	3,321,418,656	2,192,317,351
Current liabilities	2,719,940,143	1,951,371,679
Total liabilities	2,874,792,788	1,956,630,223
Total revenues	264,488,162	138,496,690	$ 58,662,900
Net income (loss)	14,690,701	19,179,245	(5,949,858)
Net cash provided by (used in) operating activities	413,203,956	535,281,015	243,309,139
Net cash (used in) provided by investing activities	10,918,825	43,555,619	(22,040,111)
Net cash provided by (used in) financing activities	330,881,355	(8,366,076)	114,906,520
VIEs
Variable Interest Entity [Line Items]
Current assets	51,873,657	48,118,025
Non-current assets	16,083,322	16,253,660
Total assets	67,956,979	64,371,685
Current liabilities	25,422,094	25,955,828
Non-current liabilities	6,858	1,158,044
Total liabilities	25,428,952	27,113,872
Total revenues	65,295,325	16,191,693	44,134,256
Net income (loss)	(700,720)	(7,524,524)	16,505,238
Net cash provided by (used in) operating activities	18,431,299	(597,323)	6,567,594
Net cash (used in) provided by investing activities	(4,048,620)	646,647	(10,240,498)
Net cash provided by (used in) financing activities	$ (5,091,778)	$ 311,688	$ 43,730

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration of supplier (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Total net revenues were executed and cleared by one supplier \| Concentration of supplier \| Supplier
Concentration Risk [Line Items]
Concentration risk (in percent)	57.40%	74.80%	78.40%

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Goodwill, Lease and Long-term investment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Impairment of goodwill	$ 0	$ 0	$ 0
Impairment loss on equity securities without readily determinable fair values	600,000	0	755,524
Impairment loss on available-for-sale investments	$ 0	$ 150,978	$ 0
Maximum
Remaining lease terms (in years)	7 years

CONVERTIBLE BOND PAYABLE

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

CONVERTIBLE BOND PAYABLE

9.	CONVERTIBLE BOND PAYABLE

2021 Series A1 Note

On February 25, 2021, the Company entered into the Convertible Note Purchase Agreement (the “Agreement”) with a group of investors (the “Investors”) to issue its convertible bonds with an aggregate principal amount of US$44 million to the Investors through a private placement (2021 Series A1 Note). The convertible notes issued will mature in 2026 unless previously converted. The 2021 Series A1 Note bears annual interest rate at 1% from the issuance date until the outstanding principal amount is fully repaid.

The Company elected the fair value option for the 2021 Series A1 Note. The Company adopted binomial-lattice option valuation model to estimate the fair value of the convertible bonds with the assistance of an independent third-party appraiser and the following assumptions for each applicable period which took into account variables such as share price, volatility, expected dividend, risk free interest rate and bond yield. Changes in fair value of convertible bonds are recognized in other income in the consolidated statements of comprehensive income (loss) during the year, with the exception of changes in fair value due to instrument-specific credit risk which are required to be recognized in accumulated other comprehensive income (loss).

On September 27 and 30, 2021, the Company and the Investors entered into an amendment agreement with a cash conversion feature added into the Agreement. Upon conversion, the Company will pay or deliver, as the case may be, cash, ADSs, or a combination of cash and ADSs, at the Company’s election. The Company accounted for the amendment as an extinguishment of the previous bonds. The changes in the fair value of the convertible bonds before and after the modification was recorded in other income in the consolidated statements of comprehensive income (loss) during the year.

As the conversion option may be settled entirely or partially in cash at the Company’s option, the Company separated the 2021 Series A1 Note into liability and equity components in accordance with ASC Subtopic 470-20, Debt with Conversion and Other Options. The carrying amount of the liability component was calculated by measuring the fair value of a similar liability that did not have an associated conversion feature. The carrying amount of the equity component representing the conversion option was determined by deducting the fair value of the liability component from the initial proceeds and recorded as additional paid-in capital. The resulting discount was accreted at an effective interest rate of 5.4% over the period from modification date to the maturity date.

9.	CONVERTIBLE BOND PAYABLE (Continued)

2021 Series A2 Note

On May 5, 2021, the Company issued US$21 million convertible bonds (2021 Series A2 Note). The convertible notes to be issued will mature in 2026 unless previously converted. The Bond bears annual interest rate at 1% from the issuance date until the outstanding principal amount is fully repaid. The 2021 Series A2 Note did not have any embedded conversion option which required to be bifurcated and separately accounted for as a derivative under ASC 815 Derivatives and Hedging, nor do they contain a cash conversion feature. The Company accounted for the 2021 Series A2 Note in accordance with ASC 470 Debt, as a single debt instrument and subsequently measured at amortized cost. No beneficial conversion feature (the “BCF”) was recognized as the set conversion price for the 2021 Series A2 Note is greater than the fair value of the ADSs price at date of issuance.

2021 Series B Note

On April 12, 2021, a consortium of institutional investors subscribed to purchase convertible notes in an aggregate principal amount of US$90 million through a private placement (2021 Series B Note). The convertible notes issued will mature in 2026 unless previously converted. The Bond bears annual interest rate at 1% from the issuance date until the outstanding principal amount is fully repaid. The 2021 Series B Note did not have any embedded conversion option which required to be bifurcated and separately accounted for as a derivative under ASC 815 Derivatives and Hedging, nor do they contain a cash conversion feature. The Company accounted for the 2021 Series B Note in accordance with ASC 470 Debt, as a single debt instrument and subsequently measured at amortized cost. No BCF was recognized as the set conversion price for the 2021 Series B Note is greater than the fair value of the ADSs price at date of issuance.

	US$
2021 Series A1 Note US$ 44,000,000 1.00% due to 2026		37,148,318
2021 Series A2 Note US$ 21,000,000 1.00% due to 2026		21,120,487
2021 Series B Note US$ 90,000,000 1.00% due to 2026		90,572,871
		148,841,676

ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Prepaid Expense And Other Assets Current [Abstract]
Accrued payroll and welfare	$ 14,760,788	$ 12,099,447
Income and non-income based taxes payables	7,156,828	4,936,372
Accrued marketing expenses	3,748,010	6,251,009
Accrued professional expenses	1,749,229	2,471,569
Advanced from customers	1,748,167	429,531
Accrued data and IT service expenses	1,443,897	622,641
Amounts due to employees for sale of their shares exercised under the share incentive plan	1,131,614
Others	2,007,644	327,632
Total	$ 33,746,177	$ 27,138,201

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Receivables from Customers (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Allowance for doubtful accounts receivable	$ 426,953	$ 91,788	$ 0

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Research and development expenses and Foreign currencies (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Summary Of Significant Accounting Policies [Line Items]
Research and development expenses	$ 47,769,773	$ 22,507,376	$ 18,033,074
Cash and cash equivalents	269,057,708	79,652,897	59,408,555
CNY
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalents	$ 1,606,471	$ 5,972,337	$ 9,473,171

GOODWILL - Schedule of Changes in Carrying Amount of Goodwill (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Balance at the beginning of year	$ 2,421,403	$ 2,421,403
Increase in goodwill related to acquisitions during the year (Note 2)	71,265
Impairment of goodwill	0	0	$ 0
Balance at the end of year	$ 2,492,668	$ 2,421,403	$ 2,421,403

ORGANIZATION AND PRINCIPAL ACTIVITIES (Tables)

12 Months Ended

Dec. 31, 2021

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Schedule of details of the Group's subsidiaries, VIEs and VIEs' subsidiaries

As of December 31, 2021, details of the Group’s major principal operating subsidiaries, VIEs and VIEs’ subsidiaries were as follows:

	Date of incorporation or acquisition	Place of establishment/ incorporation	Percentage of legal ownership
Subsidiaries:
Tiger Brokers (NZ) Limited (“TBNZ”)	August 02, 2016	New Zealand		100	%
Up Fintech International Limited (“Up International”)	February 08, 2018	Hong Kong		100	%
Tiger Fintech (Singapore) PTE Ltd. (“Tiger SG”)	March 13, 2018	Singapore		100	%
Tiger Brokers (Singapore) PTE Ltd. (“Tiger Brokers SG”)	March 27, 2018	Singapore		100	%
US Tiger Securities, Inc. (“US Tiger Securities”)	March 30, 2018	United States of America(“USA”)		100	%
Beijing Bohu Xiangshang Technology Co., LTD (“Beijing BHXS”,“Beijing WFOE I”)	May 17, 2018	PRC		100	%
Tiger Fintech Holdings, Inc (“Tiger Fintech Holdings”)	July 09, 2018	USA		100	%
Beijing Xiangshang Yixin Technology Co., Ltd (“Beijing Yixin”,“Beijing WFOE II”)	July 26, 2018	PRC		100	%
Trading Front Inc (“Trading Front”)	August 01, 2018	USA		100	%
Wealthn LLC (“Wealthn”)	August 01, 2018	USA		100	%
Kastle Limited (“Kastle”)	October 15, 2018	Hong Kong		100	%
Tung Chi Consulting Limited (“Tung Chi”)	January 29, 2019	Hong Kong		100	%
TradeUP Securities Inc (US) (“TradeUP Securities”)¹	July 12, 2019	USA		100	%
Tradeup Inc. (“Tradeup”)	October 10, 2019	USA		100	%
Hangzhou U-Tiger Technology Co. LTD (“Hangzhou U-Tiger”)	April 09,2020	PRC		100	%
Tiger Fintech (NZ) Limited (“TFNZ”)	May 17, 2021	New Zealand		100	%
Tiger Services (AU) Pty Ltd (“Tiger Services AU”)	August 27, 2021	Australia		100	%
Tiger Brokers (HK) Global Limited (“Tiger Brokers HK”)²	October 26, 2021	Hong Kong		100	%
VIEs:
Beijing Xiangshang Rongke Technology Co. LTD (“Beijing Rongke”, “Ningxia VIE”)³	June 11, 2014	PRC	Consolidated VIE
Beijing Xiangshang Yiyi Laohu Technology Group Co., LTD (“Beijing Yiyi”, “Beijing VIE”)	October 29, 2018	PRC	Consolidated VIE
VIEs’ subsidiaries:
Tiger Technology Corporation Limited (“Tiger Technology”)	October 14, 2014	Hong Kong	VIE’s subsidiary
Beijing U-Tiger Network Technology Co., LTD (“Beijing U-Tiger Network”)	April 20, 2016	PRC	VIE’s subsidiary
Beijing U-Tiger Business Service Co., Ltd (“Beijing U-Tiger Business”)	April 21, 2016	PRC	VIE’s subsidiary
Beijing Chenhao Technology Co., LTD. (“Beijing Chenhao”)	August 11, 2016	PRC	VIE’s subsidiary
Beijing Zhijianfengyi Information Technology Co., Ltd (“Beijing ZJFY”)	January 25, 2018	PRC	VIE’s subsidiary
Shenzhen Xiang Shang Hu Xun Technology Co., LTD (“HuXun”)	June 20, 2018	PRC	VIE’s subsidiary
Beijing Huyi Technology Co., Ltd (“Huyi”)	September 05, 2018	PRC	VIE’s subsidiary
Guangzhou U-Tiger Technology Co., LTD (“Guangzhou U Tiger”)	December 24, 2018	PRC	VIE’s subsidiary

¹ In August 2021, the name of “Marsco Investment Corporation” was changed to “Tradeup Securities Inc(US)”.

² In December 2021, the name of “Ocean Joy Securities Limited” was changed to “Tiger Brokers (HK) Global Limited”.

³ In May 2021, the name of “Ningxia Xiangshang Rongke Technology Co., LTD” was changed to “Beijing Xiangshang Rongke Technology Co. LTD”.

Schedule of assets, liabilities, results of operations and cash flows of the VIEs

	As of December 31,
	2020		2021
	US$		US$
Current assets		48,118,025		51,873,657
Non-current assets		16,253,660		16,083,322
Total assets		64,371,685		67,956,979
Current liabilities		25,955,828		25,422,094
Non-current liabilities		1,158,044		6,858
Total liabilities		27,113,872		25,428,952

	For the years ended December, 31
	2019		2020			2021
	US$		US$			US$
Total revenues		44,134,256		16,191,693			65,295,325
Net income (loss)		16,505,238		(7,524,524	)		(700,720	)

	For the years ended December, 31
	2019			2020			2021
	US$			US$			US$
Net cash provided by (used in) operating activities		6,567,594			(597,323	)		18,431,299
Net cash (used in) provided by investing activities		(10,240,498	)		646,647			(4,048,620	)
Net cash provided by (used in) financing activities		43,730			311,688			(5,091,778	)

- Definition

Tabular disclosure of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide.

+ References + Details

COLLATERALIZED TRANSACTIONS (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Collateralized Financings [Abstract]
Total client margin asset	$ 1,759,500,650	$ 1,626,260,131
Fulfillment of client margin financings	202,004,165	168,840,684
Fulfillment of client short sales	31,612,750	21,492,878
Securities lending to other brokers	392,897,973	434,780,528
Total collateral repledged	$ 626,514,888	$ 625,114,090

REGULATORY REQUIREMENT

12 Months Ended

Dec. 31, 2021

Regulatory Capital Requirements [Abstract]

REGULATORY REQUIREMENT

19.	REGULATORY REQUIREMENT

The Company’s broker-dealer subsidiaries, TBNZ, TradeUP Securities, US Tiger Securities, Tiger Brokers SG and Tiger Brokers HK are subject to capital requirements determined by its respective regulators.

TBNZ, the Company’s New Zealand subsidiary, was subject to New Zealand’s Exchange ("NZX") capital adequacy requirements under the Section 19, NZX Participant Rules. TBNZ was not an NZX Participant since May of 2021.

TradeUP Securities and US Tiger Securities, the Company’s USA subsidiaries, are subject to the Uniform Net Capital Rule (Rule 15c3-1) under the Exchange Act in the USA, which requires the maintenance of minimum net capital.

Tiger Brokers SG, the Company’s Singapore subsidiary, is subject to the Securities and Futures Regulations 2018 (Amendment) Regulation 2018 under Chapter 289 of Securities and Futures Act in Singapore, which requires the maintenance of minimum net capital.

Tiger Brokers HK, the Company’s Hong Kong subsidiary, is subject to Securities and Futures (Financial Resources) Rules and the Securities and Futures Ordinance, Tiger Brokers HK is required to maintain minimum paid-up share capital and liquid capital.

As of December 31, 2020 and 2021, all of the Company’s broker-dealer subsidiaries met applicable minimum net capital requirements. The tables below summaries the net capital, the capital requirement and the excess net capital for the Company’s broker-dealer subsidiaries as of December 31, 2020 and 2021:

	Net Capital		Requirement		Excess Net Capital
December 31, 2021	US$		US$		US$
TradeUP Securities		95,665,200		4,283,392		91,381,808
US Tiger Securities		10,429,009		250,000		10,179,009
Tiger Brokers SG		113,290,584		12,443,882		100,846,702
Tiger Brokers HK		14,569,722		384,635		14,185,087
Total		233,954,515		17,361,909		216,592,606
	Net Capital		Requirement		Excess Net Capital
December 31, 2020	US$		US$		US$
TBNZ		61,427,613		34,258,411		27,169,202
TradeUP Securities		14,546,628		250,000		14,296,628
US Tiger Securities		9,206,613		250,000		8,956,613
Tiger Brokers SG		9,718,825		2,382,717		7,336,108
Total		94,899,679		37,141,128		57,758,551

- Definition

The entire disclosure for regulatory capital requirement for depository and lending institutions. Institutions include, but not are not limited to, finance company, insured depository institution, bank holding company, savings and loan association holding company, bank and savings institution not federally insured, mortgage company, foreign financial institution and credit union.

+ References + Details

INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Schedule of components of profit (loss) before income taxes

The components of income (loss) before income taxes are as follows:

	For the years ended December 31,
	2019			2020			2021
	US$			US$			US$
The Cayman Islands		946,035			(1,302,817	)		2,442,082
PRC		6,117,021			20,551,832			21,320,470
International		(16,368,280	)		2,780,777			(4,708,080	)
Total income (loss) before income taxes		(9,305,224	)		22,029,792			19,054,472

Schedule of current and deferred portions of income taxes included in the consolidated statements of operations

	For the years ended December 31,
	2019			2020		2021
	US$			US$		US$
Current tax expense		2,859,774			1,077,877		5,026,081
Deferred tax expense (benefit)		(6,215,140	)		1,772,670		(662,310	)
Income tax expense (benefit)		(3,355,366	)		2,850,547		4,363,771

Schedule of significant components of the Group's deferred tax assets

The significant components of the Group’s deferred tax assets and liabilities were as follows:

	As of December 31,
	2020			2021
	US$			US$
Deferred tax assets
Accrued expenses		—			64,103
Allowance for doubtful accounts		25,704			142,385
Long-term investments		38,314			39,230
Advertising expense carryforwards		877,424			1,081,850
Net operating loss carryforwards		13,407,157			15,101,309
Withholding tax credit carryforwards		1,106,569			1,161,221
Lease liabilities		1,799,483			1,511,324
Total deferred tax assets		17,254,651			19,101,422
Less: valuation allowance		(4,000,159	)		(5,224,095	)
Deferred tax assets, net of valuation allowance		13,254,492			13,877,327

Deferred tax liabilities
Right-of-use assets		1,799,483			1,511,324
Long term investments		86,042			88,098
Intangible assets		1,449,000			1,535,965
Financial instruments held, at fair value		—			19,545
Total deferred tax liabilities		3,334,525			3,154,932

Deferred tax assets, net		9,919,967			12,258,360
Deferred tax liabilities, net		—			1,535,965

Schedule of movement of the valuation allowance

The movement of the valuation allowance is as follows:

	For the years ended December 31,
	2019			2020			2021
	US$			US$			US$
Balance at the beginning of the year		2,931,196			4,888,240			4,000,159
Additions of valuation allowance		2,573,942			1,775,887			2,814,445
Reversals of valuation allowance		—			(2,802,174	)		(1,628,176	)
Foreign currency translation adjustment		(616,898	)		138,206			37,667
Balance at the end of the year		4,888,240			4,000,159			5,224,095

Schedule of expiration status of net operating loss carryforwards

The expiration status of net operating loss carryforwards as of December 31, 2021 is listed below.

Expiration year	US$
2022		7,170
2023		434,585
2024		4,222,851
2025		9,112,742
2026 through 2031		40,608,576
Indefinitely		29,211,505

Schedule of Reconciliations between the income tax expense (benefit) computed by applying the PRC statutory income tax rate to income (loss) before income taxes and the actual income tax expense (benefit)

	For the years ended December 31,
	2019			2020			2021
	US$			US$			US$
Income (loss) before income taxes		(9,305,224	)		22,029,792			19,054,472
PRC statutory tax rate		25	%		25	%		25	%
Income tax at statutory income tax rate		(2,326,306	)		5,507,448			4,763,618
Effect of income tax rate difference in other jurisdictions		124,406			(773,402	)		596,978
Effect of preferential tax rates		(2,673,841	)		1,837,667			(1,735,439	)
Super deduction of research and development expense		(2,479,428	)		(3,607,755	)		(4,476,114	)
Effect of expenses not deductible for income tax purposes		1,425,861			912,876			4,028,459
Changes in valuation allowance		2,573,942			(1,026,287	)		1,186,269
Income tax expense (benefit)		(3,355,366	)		2,850,547			4,363,771

Lease - Balances reported in the consolidated balance sheets related to the Group's leases (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Lessee Disclosure [Abstract]
Operating lease right-of-use assets	$ 6,613,520	$ 7,280,763
Operating lease liabilities	$ 5,702,954	$ 7,207,293

SEGMENT INFORMATION

12 Months Ended

Dec. 31, 2021

Segment Reporting [Abstract]

SEGMENT INFORMATION

22.	SEGMENT INFORMATION

Segments are business units that offer different services and are reviewed separately by the chief operating decision maker (the “CODM”), or the decision-making group, in deciding how to allocate resources and in assessing performance. The CODM, who is responsible for allocating resources and assessing performance of the operating segment, has been identified as the Group’s Chief Executive Officer. The Group operates as a single operating segment. The single operating segment is reported in a manner consistent with the internal reporting provided to the CODM.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

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+ Details

GOODWILL (Tables)

12 Months Ended

Dec. 31, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill for the years ended December 31, 2020 and 2021 are as follows:

	For the years ended,
	2020		2021
	US$		US$
Balance at the beginning of year		2,421,403		2,421,403
Increase in goodwill related to acquisitions during the year (Note 2)	—			71,265
Impairment loss	—		—
Balance at the end of year		2,421,403		2,492,668

Lease - Operating lease expenses and short-term lease expenses reported in the consolidated statements of comprehensive income related to the Group's leases (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Lessee Disclosure [Abstract]
Operating lease expenses	$ 3,881,251	$ 2,985,665
Short-term lease expenses	$ 257,150	$ 508,791

CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement Of Cash Flows [Abstract]
Net of offering cost	$ 1,215,162
Net of Follow-on public offering			$ 3,462,099
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Interest expense from convertible bonds	350,519
Fair value change from convertible bonds	(2,860,123)
Changes in operating assets and liabilities:
Receivables from brokers, dealers and clearing organizations	(40,320,092)	$ (579,271,721)
Payables to brokers, dealers and clearing organizations	$ (48,235,921)	$ 164,799,238

EMPLOYEE BENEFIT PLAN (Details) - USD ($)	12 Months Ended
EMPLOYEE BENEFIT PLAN (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Compensation And Retirement Disclosure [Abstract]
Provision for employee benefits	$ 11,121,724	$ 4,323,814	$ 5,618,209

INCOME TAXES - Significant components of the Group's deferred tax assets (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets
Accrued expenses	$ 64,103	$ 0
Allowance for doubtful accounts	142,385	25,704
Long-term investments	39,230	38,314
Advertising expense carryforwards	1,081,850	877,424
Net operating loss carryforwards	15,101,309	13,407,157
Withholding tax credit carryforwards	1,161,221	1,106,569
Lease liabilities	1,511,324	1,799,483
Total deferred tax assets	19,101,422	17,254,651
Less: valuation allowance	(5,224,095)	(4,000,159)	$ (4,888,240)	$ (2,931,196)
Deferred tax assets, net of valuation allowance	13,877,327	13,254,492
Deferred tax liabilities
Right-of-use assets	1,511,324	1,799,483
Long term investments	88,098	86,042
Intangible assets	1,535,965	1,449,000
Financial instruments held, at fair value	19,545
Total deferred tax liabilities	3,154,932	3,334,525
Deferred tax assets, net	12,258,360	9,919,967
Deferred tax liabilities, net	$ 1,535,965	$ 0