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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016
Operating Loss Carryforwards [Line Items] |  |
Benefit for income taxes | $ (1,282) | $ (4,850)
Percentage of pre-tax loss | 18.00% | 24.00%
State and Local Jurisdiction [Member] |  |
Operating Loss Carryforwards [Line Items] |  |
Portion of state NOL carryforwards, not able to be utilized before expiration | $ 6,100 |

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