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Commitments and Contingencies - Additional Information (Detail) $ in Millions |  |  |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 26, 2016 USD ($) installment | Nov. 17, 2014 USD ($) | Jul. 08, 2014 USD ($) shares | Jun. 23, 2014 USD ($) | Sep. 30, 2015 shares | Mar. 31, 2015 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Rental expense under operating leases |  |  |  |  |  |  | $ 4.1 | $ 3.3 | $ 3.0
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 |  |  |  |  |  |  |
Royalty damages sought |  |  |  |  |  |  | $ 43.0 |  |
Settlement | $ 2.8 |  |  |  |  |  |  |  |
Accrued settlement |  |  |  |  |  |  | $ 2.1 |  |
Number of equal quarterly installments | installment | 8 |  |  |  |  |  |  |  |
Common Stock |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |
Net shares issued related to bonus | shares |  |  |  |  | 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) | 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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