Other Financial Statement Information - Schedule of Accrued Expenses and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Accrued clinical and drug manufacturing expenses	$ 2,536	$ 364
Accrued payroll	2,047	1,458
Related party payable	1,004	1,022
Accrued legal fees	239	457
Accrued recruiting fees	219	0
Accrued expenses and other	174	627
Accrued development milestone	0	2,000
Total accrued expenses and other current liabilities	$ 6,219	$ 5,928