Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Accrued Expenses
Accrued external research and development expenses	$ 2,810	$ 6,685
Accrued manufacturing expenses	9,536	9,219
Accrued other	1,007	1,243
Accrued employee compensation	4,055	167
Total	$ 17,408	$ 17,314