Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Accrued Expenses
Accrued payroll and employee benefits	$ 11,811	$ 11,568
Accrued research and development contract costs	33,347	20,544
Accrued professional fees	1,477	1,392
Other accrued expenses	394	338
Accrued expenses	$ 47,029	$ 33,842