Represents the number of ADS issued during the period.

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Ratio applied to the conversion of preferred stock, for example but not limited to, one preferred share converted to two or two shares converted to one.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Description of voting rights of common stock. Includes eligibility to vote and votes per share owned. Include also, if any, unusual voting rights.

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The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Price of a single share of a number of saleable stocks of a company.

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Number of shares issued during the period as a result of the conversion of convertible securities.

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Number of new stock issued during the period.

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ORDINARY SHARES (Details)	1 Months Ended			12 Months Ended
ORDINARY SHARES (Details)	Apr. 30, 2019 $ / shares shares	Mar. 31, 2019 shares	Nov. 30, 2018 shares	Dec. 31, 2019 $ / shares shares	Dec. 31, 2018 $ / shares shares	Jun. 30, 2018 shares
Class A ordinary shares
Class of Stock
Common stock, shares authorized (in shares)				4,662,388,278	3,144,831,053
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)				1,777,218,449	216,546,541	2,480,000
Common stock, shares outstanding (in shares)				1,777,218,449	216,546,541
Number of shares issued in conversion (in shares)	1,210,906,902		180,895,573
Shares issued during the period (in shares)		237,375,000
ADS issued during period		15,825,000
Offering price \| $ / shares	$ 8.00
Conversion ratio	1
Class A ordinary shares \| IPO
Class of Stock
Common stock, shares issued (in shares)				33,170,968
Common stock, shares outstanding (in shares)				33,170,968
Class A ordinary shares \| Over allotment option
Class of Stock
Shares issued during the period (in shares)		29,250,000
Class A ordinary shares \| Private placement
Class of Stock
Shares issued during the period (in shares)		13,125,000
Class B ordinary shares
Class of Stock
Common stock, shares authorized (in shares)				337,611,722	518,507,295
Par value per share (in dollars per share) \| $ / shares				$ 0.00001	$ 0.00001
Votes per share (in votes)				twenty
Common stock, shares issued (in shares)				337,611,722	337,611,722	107,863,347
Common stock, shares outstanding (in shares)				337,611,722	337,611,722
Class B ordinary shares \| IPO
Class of Stock
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
Class of Stock
Number of shares issued in conversion (in shares)				1,210,906,902
Number of shares converted				1,210,906,902
Series Angel, A, B-1, B-2, B-3 and C \| IPO
Class of Stock
Number of shares converted	1,210,906,902
Series C-1 convertible redeemable preferred shares
Class of Stock
Number of shares issued in conversion (in shares)	18,612,084			18,612,084
Number of shares converted	18,597,738			18,597,738
Offering price \| $ / shares				$ 8.00