Balance Sheet Details - Accrued Expenses (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Payables and Accruals [Abstract]
Accrued clinical trial costs	$ 1,279	$ 1,477
Accrued other	3,059	1,476
Total	$ 4,338	$ 2,953

Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer.

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