XML 12 R39.htm IDEA: XBRL DOCUMENT v3.3.0.814
Pension Plans - Additional Information (Detail) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Mar. 31, 2014
Sep. 30, 2015
Sep. 30, 2015
Compensation And Retirement Disclosure [Abstract]      
Employment benefits $ 203,111    
Number of years in providing benefits 5 years    
Pension plan expenses   $ 51,000 $ 102,000