Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	100,000,000	0
Preferred stock, shares Issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (in shares)	5,000,000,000	740,000,000
Common stock, shares issued (in shares)	578,471,000	201,327,000
Common stock, shares outstanding (in shares)	578,471,000	201,327,000
Common Class A
Common stock, shares authorized (in shares)	4,935,000,000	675,000,000
Common stock, shares issued (in shares)	527,134,000	144,039,000
Common stock, shares outstanding (in shares)	527,134,000	144,039,000
Common Class B
Common stock, shares authorized (in shares)	65,000,000	65,000,000
Common stock, shares issued (in shares)	51,337,000	57,287,000
Common stock, shares outstanding (in shares)	51,337,000	57,287,000
Convertible Preferred Stock
Convertible preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Convertible preferred stock, shares authorized (in shares)	0	349,522,000
Convertible preferred stock, shares issued (in shares)	0	337,235,000
Convertible referred stock, shares outstanding (in shares)	0	337,235,000
Convertible preferred stock, aggregate liquidation preference	$ 0	$ 335,654