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Employee Benefit Plan - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract] |  |  |
Defined contribution saving plan, vesting period | 5 years |  |
Defined contribution saving plan cost | $ 0.8 | $ 0.6 | $ 0.6

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- Definition Defined Contribution Plan Vesting Period + References No definition available. + Details
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Period Type: | duration

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- References No definition available. + Details
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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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