Stock-Based Compensation Plan - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Shares
Options outstanding, beginning balance (in shares)	8,805,850
Options granted (in shares)	458,359
Options exercised (in shares)	(493,267)
Options forfeited (in shares)	(437,588)
Options expired (in shares)	(25,664)
Options outstanding, ending balance (in shares)	8,307,690	8,805,850
Options exercisable (in shares)	3,156,445
Weighted average exercise price, beginning balance (in dollars per share)	$ 6.56
Weighted average exercise price, options granted (in dollars per share)	13.64
Weighted average exercise price, options exercised (in dollars per share)	0.75
Weighted average exercise price, options forfeited (in dollars per share)	9.49
Weighted average exercise price, options expired (in dollars per share)	1.08
Weighted average exercise price, ending balance (in dollars per share)	7.15	$ 6.56
Weighted average exercise price, options exercisable (in dollars per share)	$ 0.99
Stock options outstanding, weighted average remaining contractual term	7 years 10 months 20 days	8 years 10 days
Stock options exercisable, weighted average remaining contractual term	6 years 3 months
Stock options outstanding, aggregate intrinsic value, beginning balance	$ 147,623
Stock options outstanding, aggregate intrinsic value, ending balance	47,674,457	$ 147,623
Stock options exercisable, aggregate intrinsic value	$ 30,969,411