Accrued Liabilities - Schedule of Components of Accrued Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Payables and Accruals [Abstract]
Accrued compensation and other employee benefits	$ 2,180	$ 3,516
Accrued professional services	281	200
Accrued research and development expenses	39	41
Accrued other expenses	411	521
Total accrued expenses	$ 2,911	$ 4,278