Accrued Expenses - Accrued Expenses (Detail) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Payables And Accruals [Abstract]
Research and development expenses	$ 1,576	$ 1,544
Payroll and other employee-related expenses	144	750
Professional services	215	225
Interest on debt	81	146
Other	214	134
Total	$ 2,230	$ 2,799