Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Convertible preferred stock, par value	$ 0.0001	$ 0.0001
Convertible preferred stock, shares authorized	0	537,786,000
Convertible preferred stock, shares issued	0	134,113,000
Convertible preferred stock, shares outstanding	0	134,113,000
Convertible preferred stock, aggregate liquidation preference	$ 0	$ 926,666
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	50,000,000	0
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	750,000,000	707,000,000
Common stock, shares issued	178,941,000	16,170,000
Common stock, shares outstanding	178,941,000	16,170,000