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Income Taxes - Additional Information (Detail) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 | Jun. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Income Tax Disclosure [Abstract] |  |  |  |  |  |
Statutory tax rate | 5.10% |  | 19.00% | 12.00% | 20.40% |
Liability for uncertain tax position | $ 0 |  |  | $ 0 |  | $ 0
PPPChangeInTaxRateDeferredTaxLiabilityIncomeTaxBenefit |  | $ 821,000 |  |  |  |

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