Lease - Components of lease expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Leases
Operating lease cost	$ 1,225	$ 1,225
Variable lease cost	1,060	982
Total lease costs	2,285	2,207
Finance lease cost
Amortization of right of use asset	$ 49	$ 85
Finance Lease, Right-of-Use Asset, Statement of Financial Position	Other non-current assets	Other non-current assets
Interest on lease liability	$ 1	$ 6