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Commitments and Contingencies - Additional Information (Detail) |  | 3 Months Ended
--- | --- | ---
Nov. 19, 2018 USD ($) ft² | Mar. 31, 2023 USD ($) | Mar. 31, 2022 USD ($)
Other Commitments [Line Items] |  |  |
Consolidated rent expense |  | $ 29,000 | $ 33,000
Indemnification obligations |  | 0 |
Expenses related to indemnification issues |  | $ 0 |
Vancouver Lease Arrangement [Member] | Vancouver, British Columbia [Member] |  |  |
Other Commitments [Line Items] |  |  |
Lease agreement commencement date | Feb. 01, 2019 |  |
Area of office space leased | ft² | 2,367 |  |
Operating lease, term of contract | 4 years |  |
Annual rent expense | $ 100,000 |  |

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