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Net (Loss) Income Per Common Share - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Earnings Per Share [Abstract] |  |  |
Dilutive effects from equity instruments | 0 | 0 | 0
Cash would be received upon exercise of warrants | $ 84.4 |  |

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