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Common Stock - Authorized - Additional Information (Detail) - $ / shares | Sep. 30, 2021 | Dec. 31, 2020
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Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |  |
Common stock, shares authorized | 150,000,000 | 150,000,000
Common stock, par value | $ 0.001 | $ 0.001
Preferred stock, shares authorized | 5,000,000 |
Preferred stock, par value | $ 0.001 |

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