Equity-Based Compensation - Stock option activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Options Outstanding
Outstanding at beginning of period (in shares)	4,088,456
Granted (in shares)	874,830
Exercised (in shares)	(2,657)
Cancelled/forfeited (in shares)	(12,253)
Outstanding at end of period (in shares)	4,948,376	4,088,456
Exercisable at end of period (in shares)	1,064,255
Vested and expected to vest at end of period (in shares)	4,948,376
Weighted Average Exercise Price
Outstanding (in dollars per share)	$ 9.30	$ 8.59
Granted (in dollars per share)	12.67
Exercised (in dollars per share)	5.89
Cancelled/forfeited (in dollars per share)	13.71
Exercisable at end of period (in dollars per share)	7.09
Vested and expected to vest at end of period (in dollars per share)	$ 9.30
Weighted Average Remaining Contractual Term (In years)
Outstanding (in years)	9 years 25 days	9 years 1 month 17 days
Exercisable at end of period (in years)	8 years 3 months 7 days
Vested and expected to vest at end of period (in years)	9 years 25 days
Aggregate Intrinsic Value
Outstanding (in dollars)	$ 2,832	$ 30,291
Exercisable (in dollars)	1,115
Vested and expected to vest (in dollars)	$ 2,832