Net Loss Per Share Attributable to Common Stockholders - Summary of Calculation of Basic and Diluted Net Loss Per Share Attributable to Common Stockholders (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Numerator:
Net loss	$ (111,903)	$ (385,160)
Less: Accretion of redeemable convertible preferred stock	0	(4,135)
Net loss attributable to common stockholders, basic	(111,903)	(389,295)
Net loss attributable to common stockholders, diluted	$ (111,903)	$ (389,295)
Denominator:
Weighted-average shares used in computing net loss per share, basic (in shares)	222,526,454	60,576,886
Weighted-average shares used in computing net loss per share, diluted (in shares)	222,526,454	60,576,886
Net loss per share:
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (0.50)	$ (6.43)
Net loss per share attributable to common stockholders, diluted (in dollars per share)	$ (0.50)	$ (6.43)