Prepaid Expenses and Other Current Assets and Accrued Expenses - Schedule of Prepaid Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Prepaid Expense and Other Assets, Current [Abstract]
CRO advances	$ 20,011	$ 10,757
Prepaid research and development	1,381	541
Prepaid clinical trial expenses	720	750
Prepaid insurance	539	693
Other prepaid expenses and other current assets	787	478
Total prepaid expenses and other current assets	$ 23,438	$ 13,219