Accounts Payable and Accrued Expenses - Schedule of Accounts Payable and Accrued Expenses (Detail) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Accounts Payable and Accrued Expenses
Accounts payable	$ 2,541	$ 11,583
Accrued research projects	1,490	4,343
Accrued compensation and benefits	1,173	6,519
Accrued professional fees and other	1,418	3,147
Total	$ 6,622	$ 25,592