Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Accrued Expenses
Accrued research and development expenses	$ 5,047	$ 5,172
Accrued employee compensation and benefits	1,014	1,142
Accrued professional fees	336	1,756
Other accrued expenses	452	8
Total accrued expenses	$ 6,849	$ 8,078