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Stockholders' Equity - Additional Information (Detail) - USD ($) $ in Thousands, shares in Millions | 1 Months Ended | 9 Months Ended
--- | --- | ---
Aug. 31, 2020 | Sep. 30, 2020
Class Of Stock [Line Items] |  |
Common stock issues in connection with merger agreement |  | $ 44,280
Cersci Therapeutics |  |
Class Of Stock [Line Items] |  |
Stock issued in connection with acquisition, shares | 1.2 |
Common stock issues in connection with merger agreement | $ 44,300 |

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