Commitments and Contingencies - Lease costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Lease costs
Operating lease cost	$ 1,764	$ 1,620
Short-term lease cost	33	39
Variable lease cost	970	983
Total lease cost	2,767	2,642
Assets:
Right-of-use asset - operating leases	10,766	11,241
Liabilities
Operating lease liability, current	864	774
Operating lease liabilities, net of current portion	17,170	17,969
Total operating lease liabilities	$ 18,034	$ 18,743
Other information
Weighted-average remaining lease term (in years)	10 years 8 months 12 days	11 years 8 months 12 days
Weighted-average incremental borrowing rate	7.00%	7.00%