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Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions |  |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Nov. 17, 2014 | Jul. 08, 2014 | Jun. 23, 2014 | Dec. 31, 2015 | Mar. 31, 2015 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Future minimum sublease income |  |  |  | $ 0.1 |  | $ 0.1 |  |
Rental expense under operating leases |  |  |  |  |  | $ 3.3 | $ 3.0 | $ 4.1
Minimum period financial metrics must be met |  |  |  |  |  | 6 months |  |
Accrued bonus liability |  |  |  |  |  |  | $ 5.5 |
Total bonus expense |  |  |  |  | $ 10.7 | $ 5.2 |  |
Consideration for litigation settlement paid by the Company |  |  | $ 6.0 |  |  |  |  |
Consideration for litigation settlement paid by insurance |  | $ 1.7 | 1.7 |  |  |  |  |
Legal settlement promissory note amount |  | 5.0 | 5.0 |  |  |  |  |
Loss contingency damages paid by the company |  | 4.3 |  |  |  |  |  |
Amount for share price fluctuation related to litigation settlement | $ 0.8 |  |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Net shares issued related to bonus |  |  |  | 2,158,436 |  |  |  |
Unrestricted Stock |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Legal settlement in shares, value issued |  | $ 5.0 | $ 5.0 |  |  |  |  |
Legal settlement, common stock issued (shares) |  | 2,407,318 |  |  |  |  |  |
Secured Promissory Note |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Secured note maturity period |  |  | 30 months |  |  |  |  |
Secured note interest rate percentage |  |  | 5.00% |  |  |  |  |

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