CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Convertible preferred stock, par value (in dollars per share)		$ 0.0001	$ 0.0001
Convertible preferred stock, shares authorized (in shares)		0	1,058,949,780
Convertible preferred stock, shares issued (in shares)		0	957,159,704
Convertible preferred stock, shares outstanding (in shares)	[1]	0	957,159,704
Convertible preferred stock, liquidation preference amount		$ 0	$ 3,497,913
Preferred stock, par value (in dollars per share)		$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)		10,000,000	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)		15,000,000,000	1,189,800,259
Common stock, shares, issued (in shares)		1,641,642,816	28,791,702
Common stock, shares outstanding (in shares)		1,641,642,816	28,791,702

[1] The number of shares of convertible preferred stock and common stock issued and outstanding prior to the Merger have been retroactively adjusted by the Exchange Ratio to give effect to the reverse recapitalization treatment of the Merger. See Note 1 - Description of Business and Note 3 - Reverse Capitalization for more information.