Supplemental Balance Sheet Information - Summary of Prepaid Expenses and Other Current Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Supplemental Balance Sheet Information Disclosures [Abstract]
Tax incentive refund	$ 2,697	$ 2,558
Prepaid research and development expenses	4,496	3,145
Prepaid insurance	112	973
Prepaid compensation benefits	575	609
Interest income receivable		4
Other current assets	1,698	271
Prepaid expenses and other current assets	$ 9,578	$ 7,560