Other Financial Statement Information - Schedule of Accrued Expenses and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Other Financial Statement Information [Abstract]
Accrued research and development contract costs	$ 5,200	$ 364
Accrued development milestone	2,000	2,000
Related party payable	1,640	1,022
Accrued payroll	460	1,458
Accrued legal fees	253	457
Accrued expenses and other	598	627
Total accrued expenses and other current liabilities	$ 10,151	$ 5,928