Accounts Payable and Accrued Expenses - Schedule of Accounts Payable and Accrued Expenses (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Accounts Payable and Accrued Expenses
Accounts payable	$ 7,978	$ 9,604
Accrued research projects	6,304	5,200
Accrued compensation and benefits	5,370	5,219
Accrued professional fees and other	2,732	1,517
Total	$ 22,384	$ 21,540