Stock Based Compensation - Stock option activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Number of Shares
Exercisable (in shares)	111,756	27,869
Aggregate Intrinsic Value
Proceeds from exercise of stock options	$ 410	$ 213
Stock options
Number of Shares
Outstanding at beginning of period (in shares)	1,625,256
Granted (in shares)	2,311,485
Exercised (in shares)	(431,687)
Forfeited (in shares)	(43,184)
Outstanding at end period (in shares)	3,461,870	1,625,256
Exercisable (in shares)	2,359,876
Weighted Average Exercise Price
Weighted-Average Exercise Price Outstanding at beginning period (in dollars per share)	$ 1.88
Weighted Average Exercise Price Granted (in dollars per share)	14.67
Weighted Average Exercise Price Exercised (in dollars per share)	2.17
Weighted Average Exercise Price Forfeited (in dollars per share)	3.14
Weighted Average Exercise Price Outstanding at end period (in dollars per share)	10.38	$ 1.88
Weighted Average Exercise Price Exercisable	$ 5.84
Weighted Average Contractual Term (in years)
Weighted Average Contractual Term, Outstanding (in years)	9 years 1 month 13 days
Weighted Average Contractual Term, Exercisable (in dollars per share)	8 years 9 months 14 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value Outstanding	$ 26,730
Aggregate Intrinsic Value, Exercisable	26,730
Aggregate intrinsic value of stock options exercised	2,800	$ 100
Proceeds from exercise of stock options	$ 900	$ 200
Weighted-average grant-date fair value of stock options granted	$ 9.39	$ 1.56
Unrecognized compensation cost	$ 20,900
Unrecognized compensation cost, weighted-average period for recognition	3 years 6 months