Income Taxes - Schedule of Reconciliation of the Beginning and Ending Amount of Gross Unrecognized Tax Positions (Detail) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Income Tax Uncertainties [Abstract] | ||
| Unrecognized tax benefits, beginning of year | $ 33 | $ 26 |
| Additions related to current year tax positions | 20 | 7 |
| Net deferred tax assets | $ 53 | $ 33 |