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Convertible Preferred Stock and Common stock - Schedule of Stock by Class (Detail) - shares	Mar. 31, 2021	Dec. 31, 2020
Class of Stock [Line Items]
Shares Authorized	1,371,373,770	700,754,910
Shares Issued	146,102,070	125,221,900
Shares Outstanding	143,852,070	122,971,900
Class A common stock [Member]
Class of Stock [Line Items]
Shares Authorized	1,000,754,910	530,136,050
Shares Issued	126,295,420	118,549,390
Shares Outstanding	124,045,420	116,299,390
Class B common stock [Member]
Class of Stock [Line Items]
Shares Authorized	270,618,860	170,618,860
Shares Issued	4,562,160	6,672,510
Shares Outstanding	4,562,160	6,672,510
Class C common stock [Member]
Class of Stock [Line Items]
Shares Authorized	100,000,000
Shares Issued	15,244,490
Shares Outstanding	15,244,490

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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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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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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