Stock-based Compensation - Summary of Stock Option Activity (Details) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares
Number of Stock Options
Beginning balance (in shares) | shares	41,775,179
Granted (in shares) | shares	9,931,442
Exercised (in shares) | shares	(3,512,765)
Canceled or forfeited (in shares) | shares	(2,083,979)
Ending balance (in shares) | shares	46,109,877	41,775,179
Exercisable (in shares) | shares	26,446,733
Weighted- Average Exercise Price Per Share
Beginning balance (in dollars per share) | $ / shares	$ 5.05
Granted (in dollars per share) | $ / shares	5.97
Exercised (in dollars per share) | $ / shares	2.63
Cancelled or forfeited (in dollars per share) | $ / shares	6.07
Ending balance (in dollars per share) | $ / shares	5.38	$ 5.05
Exercisable (in dollars per share) | $ / shares	$ 4.27
Weighted- Average Remaining Contractual Life (in years)
Options Outstanding	7 years 6 months 14 days	7 years 10 months 2 days
Options Exercisable	6 years 7 months 20 days
Aggregate Intrinsic Value (in thousands)
Options Outstanding | $	$ 120,296	$ 142,076
Options Exercisable | $	$ 94,486