Net Loss per Share Attributable to Common Stockholders - Schedule of Computation of Basic and Diluted Earnings per Share Attributable to Common Stockholders (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net loss attributable to common stockholders	$ (41,381)	$ (39,963)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic (in shares)	323,334	305,947
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted (in shares)	323,334	305,947
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (0.13)	$ (0.13)
Net loss per share attributable to common stockholders, diluted (in dollars per share)	$ (0.13)	$ (0.13)
Class A | Common stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net loss attributable to common stockholders	$ (35,791)	$ (32,889)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic (in shares)	279,658	251,793
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted (in shares)	279,658	251,793
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (0.13)	$ (0.13)
Net loss per share attributable to common stockholders, diluted (in dollars per share)	$ (0.13)	$ (0.13)
Class B | Common stock
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net loss attributable to common stockholders	$ (5,590)	$ (7,074)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic (in shares)	43,676	54,154
Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted (in shares)	43,676	54,154
Net loss per share attributable to common stockholders, basic (in dollars per share)	$ (0.13)	$ (0.13)
Net loss per share attributable to common stockholders, diluted (in dollars per share)	$ (0.13)	$ (0.13)