Supplemental Balance Sheet Information - Components of Accrued Expenses (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Accrued Liabilities Current [Abstract]
Accrued payroll and compensation	$ 4,320	$ 3,687
Accrued research and development expenses	914	1,250
Accrued professional services	421	384
Accrued interest	1,106	974
Operating lease liabilities	1,195	1,174
Other accrued expenses	994	869
Total accrued expenses and other current liabilities	$ 8,950	$ 8,338