Commitments and Contingencies - Components of lease expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Commitments and contingencies
Operating lease cost	$ 1,036	$ 273	$ 1,942	$ 505
Variable lease cost	328	143	595	222
Total lease cost	$ 1,364	$ 416	$ 2,537	$ 727
Weighted-average remaining operating lease term (years)	4 years 8 months 12 days	4 years 9 months 18 days	4 years 8 months 12 days	4 years 9 months 18 days
Weighted-average discount rate	7.04%	7.92%	7.04%	7.92%