Other Financial Statement Information - Schedule of Prepaid Expenses and Other Current Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Other Financial Statement Information [Abstract]
Prepaid clinical trial and drug manufacturing costs	$ 7,162	$ 320
Prepaid insurance	1,629	1,193
Prepaid equity financing costs	483	275
Prepaid rent	241	219
Prepaid audit fees	200	123
Prepaid recruiting fees	55	253
Other	792	480
Total prepaid expenses and other current assets	$ 10,562	$ 2,863