Stock-Based Compensation - Summary of Equity Award Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Shares available for grant
Balance as of beginning of period (in shares)	3,880,274
Number of shares authorized (in shares)		1,519,241
Options granted (in shares)	(109,800)
Options exercised (in shares)	0
Options cancelled (in shares)	221,176
Balance as of end of period (in shares)	4,621,192	3,880,274
Outstanding Stock Options
Balance as of beginning of period (in shares)	14,940,182
Options granted (in shares)	109,800
Options exercised (in shares)	(429,639)
Options cancelled (in shares)	(221,176)
Balance as of end of period (in shares)	14,399,167	14,940,182
Vested and exercisable, end of period (in shares)	8,575,879
Weighted-average exercise Price
Balance as of beginning of period (USD per share)	$ 5.19
Options granted (USD per share)	13.29
Options exercised (USD per share)	2.06
Options cancelled (USD per share)	5.54
Balance as of end of period (USD per share)	5.34	$ 5.19
Vested and exercisable, end of period (USD per share)	$ 2.26
Additional Disclosures
Options outstanding, Weighted-average remaining contractual life (years)	6 years 6 months 14 days	6 years 8 months 8 days
Vested and exercisable, Weighted-average remaining contractual life, end of period (years)	4 years 10 months 17 days
Options outstanding, Aggregate intrinsic value	$ 93,993	$ 182,843
Vested and exercisable, Aggregate intrinsic value, end of period	$ 72,090
Restricted Stock Units
Shares available for grant
Restricted Stock Units (“RSUs”) granted (in shares)	(897,224)
RSUs cancelled (in shares)	7,525