Leases - Lease costs and other lease information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Lease costs
Operating lease cost	$ 411	$ 496
Variable lease cost	213	233
Short-term lease cost	45	37
Finance lease cost
Interest on lease liabilities	4	8
Amortization of right-of-use assets	29	29
Sublease Income	(57)	(60)
Net lease cost	645	743
Cash paid for amounts included in the measurement of lease liabilities operating cash flows from operating leases	$ 392	$ 487