Leases - Lease right-of-use assets and liabilities (Details) $ in Thousands	Mar. 31, 2023 USD ($) item	Dec. 31, 2022 USD ($)
Leases
Number of finance leases | item	0
Lease Right-of-Use Assets
Operating lease right-of-use assets	$ 5,122	$ 5,419
Total lease right-of-use assets	5,122	5,419
Operating lease liabilities	5,545	5,902
Total lease liabilities	$ 5,545	$ 5,902