Leases - Summary of Lease Liabilities Related to Lease Shown in Consolidated Financial Statements (Detail) - USD ($) $ in Thousands |
Dec. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Lease Liabilities [Abstract] | ||
| Current lease liabilities | $ 686 | $ 696 |
| Non-current lease liabilities | 240 | 952 |
| Total lease liabilities | $ 926 | $ 1,648 |