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Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions | 1 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 31, 2015 | Jun. 30, 2015
Loss Contingencies [Line Items] |  |
Period of time to achieve earnings and cash building targets |  | 6 months
Accrued bonus liability |  | $ 10.7
Total estimated expense |  | $ 5.2
Subsequent Event | Common Stock |  |
Loss Contingencies [Line Items] |  |
Issued (in shares) | 2,155,193 |

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