Commitments and Contingencies - Components of lease expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Commitments and contingencies
Operating lease cost	$ 924	$ 273	$ 2,866	$ 773
Variable lease cost	410	222	1,005	444
Total lease cost	$ 1,334	$ 495	$ 3,871	$ 1,217
Weighted-average remaining operating lease term (years)	4 years 6 months	4 years 7 months 6 days	4 years 6 months	4 years 7 months 6 days
Weighted-average discount rate	7.03%	7.89%	7.03%	7.89%