Leases - Lease costs and other lease information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Lease costs
Operating lease cost	$ 414	$ 492	$ 825	$ 988
Variable lease cost	150	158	363	391
Short-term lease cost	43	46	88	83
Finance lease cost
Interest on lease liabilities	1	7	5	15
Amortization of right-of-use assets	29	29	58	58
Sublease Income	(59)	(52)	(116)	(112)
Net lease cost	578	680	1,223	1,423
Cash paid for amounts included in the measurement of lease liabilities operating cash flows from operating leases	$ 393	$ 474	$ 784	$ 961