Right-of-use Asset and Lease Liability - Operating lease information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Right-of-use Asset and Lease Liability
Cash paid for operating lease liabilities	$ 467	$ 314
Right-of-use assets obtained in exchange for new operating lease obligations		$ 63
Weighted-average remaining lease term	3 years 4 months 24 days	4 years 7 months 6 days
Weighted-average discount rate	3.50%	3.40%