Equity-Based Compensation - Summary of Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Number of options
Number of options outstanding, beginning balance (in shares)	38,587,921
Number of options, granted (in shares)	12,736,376
Number of options, exercised (in shares)	(445,437)
Number of options, forfeited (in shares)	(2,592,195)
Number of options, expired (in shares)	(819,523)
Number of options outstanding, ending balance (in shares)	47,467,142	38,587,921
Vested and expected to vest, number of options (in shares)	47,467,142
Exercisable, number of options (in shares)	26,466,365
Weighted average exercise price
Weighted average exercise price, beginning balance (in dollars per share)	$ 6.45
Weighted average exercise price, granted (in dollars per share)	4.36
Weighted average exercise price, exercised (in dollars per share)	2.43
Weighted average exercise price, forfeited (in dollars per share)	3.53
Weighted average exercise price, expired (in dollars per share)	8.98
Weighted average exercise price, ending balance (in dollars per share)	6.04	$ 6.45
Vested and expected to vest, weighted average exercise price (in dollars per share)	6.04
Exercisable, weighted average exercise price (in dollars per share)	$ 8.00
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]
Weighted average remaining contractual term, outstanding	6 years 6 months 29 days	6 years 9 months 10 days
Weighted average remaining contractual term, vested and expected to vest	6 years 6 months 29 days
Weighted average remaining contractual term, exercisable	4 years 10 months 28 days
Aggregate intrinsic value, outstanding	$ 42,807	$ 26,054
Aggregate intrinsic value, vested and expected to vest	42,807
Aggregate intrinsic value, exercisable	$ 16,725