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Intangible Assets - Summary Amortization Expense Related to Net Intangible Asset (Detail) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]    
2016 $ 5,106,000  
2017 3,942,000  
2018 2,687,000  
2019 1,489,000  
2020 1,114,000  
Thereafter 1,349,000  
Intangible assets, net $ 15,686,954 $ 14,681,410