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		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator:
Net loss attributable to common stockholders, basic	$ (61,436)	$ (113,161)	$ (220,687)	$ (333,659)
Net loss attributable to common stockholders, diluted	$ (61,436)	$ (113,161)	$ (220,687)	$ (333,659)
Denominator:
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic (in shares)	229,537,972	224,745,672	227,989,087	223,698,744
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted (in shares)	229,537,972	224,745,672	227,989,087	223,698,744
Net loss per share:
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (0.27)	$ (0.50)	$ (0.97)	$ (1.49)
Net loss per share attributable to common stockholders, diluted (in dollars per share)	$ (0.27)	$ (0.50)	$ (0.97)	$ (1.49)