Stock-Based Compensation - Summary of Stock Option Activity (Details) - Class A Common Stock - $ / shares	9 Months Ended
	Sep. 30, 2022
Stock Options Outstanding
Beginning balance (in shares)	30,905,543
Options granted (in shares)	13,347,197
Options exercised (in shares)	(6,940,485)
Options forfeited and cancelled (in shares)	(4,957,961)
Ending balance (in shares)	32,354,294
Options outstanding, exercisable at end of period (in shares)	18,514,946
Weighted Average Exercise Price
Weighted-average exercise price (in dollars per share)	$ 1.24
Weighted average exercise price, options granted (in dollars per share)	2.28
Weighted average exercise price, options exercised (in dollars per share)	0.32
Weighted average exercise price, options forfeited and cancelled (in dollars per share)	3.83
Weighted-average exercise price (in dollars per share)	1.47
Weighted average exercise price, options exercisable (in dollars per share)	$ 0.82