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Employee Benefit Plans - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2017 USD ($)
Retirement Benefits [Abstract] |
Maximum rate of employees' contribution to 401(k) plan | 100.00%
Employer match percentage | 200.00%
Employer matching contributions | $ 1,500

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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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