Accounts Payable and Accrued Expenses - Schedule of Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Accounts Payable and Accrued Expenses [Abstract]
Research and development	$ 15,216	$ 13,867
Investment payable	0	13,137
Employee compensation	4,192	9,930
Property and equipment	923	1,077
Professional fees	7,003	6,006
Other	2,751	1,772
Total accounts payable and accrued expenses	$ 30,085	$ 45,789