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Employee Benefit Plan - Additional Information (Detail) - USD ($) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Compensation And Retirement Disclosure [Abstract] |  |  |
Defined contribution plan, employer's matching contribution percent | 50.00% |  |
Percentage of employer matching contribution to employee contribution | 6.00% | 6.00% | 6.00%
Maximum percentage limit of employee contributions | 6.00% | 6.00% | 6.00%
Defined contribution plan, maximum employer's contribution per employee | $ 3,000 | $ 3,000 | $ 2,000
Aggregate employers contributions to defined contribution plan | $ 300,000 | $ 300,000 | $ 200,000

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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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- 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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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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- Definition Maximum amount the employee may contribute to a defined contribution plan. + References No definition available. + Details
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- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
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