Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Accrued Expenses
Compensation and benefits	$ 2,634	$ 4,326
Clinical trial costs	12,129	9,600
Professional fees	2,936
Research and development	8,713	13,041
Interest on Tranche 1 Notes	6,499	732
Manufacturing costs	5,834	7,400
Consulting	1,472	3,093
Fixed assets	2,104	694
Rent and facilities costs	142
Other	176	932
Accrued expenses	$ 42,639	$ 39,818