CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2021	Dec. 31, 2020	May 17, 2019
Convertible senior preferred shares
Mezzanine equity, par value (in US dollars per share)	$ 0.000002	$ 0.000002
Mezzanine equity, shares authorized (in shares)	307,692,307	0
Mezzanine equity, shares issued (in shares)	295,384,615	0
Mezzanine equity, shares outstanding (in shares)	295,384,615	0
Class A ordinary shares
Mezzanine equity, par value (in US dollars per share)	$ 0.000002
Equity, par value (in US dollars per share)			$ 0.000002
Equity, shares authorized (in shares)	19,692,307,693	20,000,000,000
Equity, shares issued (in shares)	1,950,457,380	1,880,396,244
Equity, shares outstanding (in shares)	1,950,457,380	1,880,396,244
Class B ordinary shares
Mezzanine equity, par value (in US dollars per share)	$ 0.000002
Equity, par value (in US dollars per share)			$ 0.000002
Equity, shares authorized (in shares)	5,000,000,000	5,000,000,000
Equity, shares issued (in shares)	144,778,552	144,778,552
Equity, shares outstanding (in shares)	144,778,552	144,778,552

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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