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401(k) Plan - Additional Information (Detail) - 401 (k) Plan [Member] - USD ($) | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employer Contribution to plan | 50.00% |  |
Percentage of employee eligible for compensation in the form of shares | 6.00% |  |
Contributions expense | $ 230,000 | $ 184,000 | $ 132,000

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- Definition Defined contribution plan eligible compensation employer maximum contribution percentage. + 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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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Details
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