v3.8.0.1

Commitments and Contingencies - Additional Information (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) ExecutiveOfficer | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Other Commitments [Line Items] |  |  |
Number of executive officers contained automatic renewal provisions | ExecutiveOfficer | 4 |  |
Contractual settlement |  | $ 1,400,000 |
Non-Cancelable operating lease expiration date | Sep. 30, 2021 |  |
Non-Cancelable lease agreement for office equipment, expiration year | 2022 |  |
Rent expense under lease arrangements | $ 748,000 | 1,025,000 | $ 1,002,000
Legal settlement received from a service provider |  | $ 1,100,000 |
Employment Agreements [Member] |  |  |
Other Commitments [Line Items] |  |  |
Commitment under contracts | $ 6,300,000 |  |

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- Definition Contractual settlement. + References No definition available. + Details
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- Definition Number of executive officers contained automatic renewal provisions. + References No definition available. + Details
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- Definition Operating lease expiration date. + References No definition available. + Details
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- Definition Operating leases expiration year. + References No definition available. + Details
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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
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- Definition Amount awarded from other party in judgment or settlement of litigation. + References No definition available. + Details
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- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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