Income Taxes - Schedule of Components of Current Provision for Income Taxes (Detail) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Current: | ||
| State | $ 1,000 | |
| Foreign | $ 143,000 | 160,000 |
| Total current provision for income taxes | 143,000 | 161,000 |
| Deferred: | ||
| Total deferred provision for income taxes | $ 0 | $ 0 |