Other Financial Statement Information - Schedule of Accrued Expenses and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Other Financial Statement Information [Abstract]
Accrued clinical and drug manufacturing expenses	$ 2,454	$ 364
Accrued development milestone	2,000	2,000
Related party payable	1,696	1,022
Accrued payroll	1,223	1,458
Accrued legal fees	176	457
Accrued expenses and other	196	627
Total accrued expenses and other current liabilities	$ 7,745	$ 5,928