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Preferred Stock and Common stock - Schedule of Stock by Class (Detail) - $ / shares
Mar. 31, 2022
Dec. 31, 2021
Class of Stock [Line Items]    
Shares authorized (in shares) 13,850,000,000 13,850,000,000
Shares issued (in shares) 426,965,766 409,267,751
Shares outstanding (in shares) 426,965,766 409,267,751
Common stock par or stated value per share (in dollars per share) $ 0.00001 $ 0.00001
Class A common stock    
Class of Stock [Line Items]    
Shares authorized (in shares) 12,500,000,000 12,500,000,000
Shares issued (in shares) 409,294,907 391,912,514
Shares outstanding (in shares) 409,294,907 391,912,514
Class B common stock    
Class of Stock [Line Items]    
Shares authorized (in shares) 1,250,000,000 1,250,000,000
Shares issued (in shares) 0 0
Shares outstanding (in shares) 0 0
Class C common stock    
Class of Stock [Line Items]    
Shares authorized (in shares) 100,000,000 100,000,000
Shares issued (in shares) 17,670,859 17,355,237
Shares outstanding (in shares) 17,670,859 17,355,237