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Income Taxes - Additional Information (Detail) - USD ($) |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 29, 2020 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2007
Income Tax [Line Items] |  |  |  |  |
Increase (decrease) in valuation allowance |  | $ (5,500,000) | $ 23,100,000 |  |
Gross federal R&D credit-related deferred tax assets derecognized |  | 26,100,000 |  |  |
Unrecognized tax benefit |  | 1,883,000 | 4,704,000 | $ 2,955,000 |
Tax-related penalties or interest recognized |  | 0 | 0 |  |
Uncertain tax positions |  | 0 | $ 0 |  |
Federal Income Tax |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |
Net operating loss carryforwards |  | $ 194,100,000 |  |  | $ 156,500,000
Net operating loss carryforwards expiration year |  | 2037 |  |  |
Net operating loss carryforwards having indefinite life |  | $ 192,400,000 |  |  |
Tax credit carryforwards available to offset future federal tax liabilities |  | $ 8,500 |  |  |
Credit carryforward, expire year |  | 2042 |  |  |
Net operating loss carryforward, derecognized |  | $ 32,900,000 |  |  |
State Income Tax |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |
Net operating loss carryforwards |  | $ 3,600,000 |  |  |
Net operating loss carryforwards expiration year |  | 2032 |  |  |
Tax credit carryforwards available to offset future federal tax liabilities |  | $ 7,500,000 |  |  |
CALIFORNIA |  |  |  |  |
Income Tax [Line Items] |  |  |  |  |
Net operating loss carryforwards |  | 75,200,000 |  |  |
Net operating loss carryforward, derecognized |  | $ 0 |  |  |
Maximum amount of tax offset per year | $ 5,000,000 |  |  |  |
Required Minimum Taxable Income | $ 1,000,000 |  |  |  |

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