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Employee Profit Sharing Plan - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]    
Defined contribution plan eligibility service period (in months) 3 months  
Percentage of employer's matching contributions to a defined contribution plan that vests 25.00%us-gaap_DefinedContributionPlanEmployersMatchingContributionAnnualVestingPercentage  
Percentage of employees' gross pay for which employer contributes a matching contribution 10.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent  
Contribution to employee compensation plan by employer $ 150us-gaap_DefinedBenefitPlanContributionsByEmployer $ 175us-gaap_DefinedBenefitPlanContributionsByEmployer