Annual report pursuant to Section 13 and 15(d)

Retirement Plan - Additional Information (Detail)

v2.4.1.9
Retirement Plan - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]    
Employer matching contribution percentage 3.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent  
Total matching contributions $ 34,488us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount $ 27,747us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount