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Stock-Based Compensation - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Share-based Payment Arrangement [Abstract] |  |  |  |
Non-cash compensation expense | $ 40 | $ 67 | $ 160 | $ 89
Fair value of restricted stock awards |  |  | $ 1,000 |

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