Commitments and Contingencies - Minimum lease commitments (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Minimum lease commitments, Payments due by period:
2024	$ 870
2025	4,253
2026	4,528
2027	4,370
2028	4,170
Thereafter	34,911
Total future minimum lease payments	53,102
Less: Imputed interest	(15,079)
Total operating lease liabilities	$ 38,023
Operating Lease, Liability, Statement of Financial Position	Long-term operating lease liabilities, Accrued expenses and other current liabilities
Operating lease liability, current	$ 3,602	$ 4,025
Operating Lease, Liability, Current, Statement of Financial Position	Accrued expenses and other current liabilities
Long-term operating lease liabilities	$ 34,421	$ 31,529
Total operating lease liabilities	$ 38,023
Operating Lease, Liability, Statement of Financial Position	Long-term operating lease liabilities, Accrued expenses and other current liabilities