Leases (Components of operating lease expense) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Components of operating lease expense
Finance lease amortization of right-of-use asset	$ 71	$ 92	$ 141	$ 92
Finance lease interest on lease liability	68	46	137	46
Operating lease expense	731	603	1,463	1,329
Variable lease expense	488	345	881	558
Short-term lease expense	5	5	10	10
Total lease expense	$ 1,363	$ 1,091	$ 2,632	$ 2,035