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Goodwill - Summary of Carrying Amount of Goodwill (Detail) - USD ($)
3 Months Ended 12 Months Ended
Sep. 30, 2015
Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]    
Beginning Balance   $ 8,857,516
Assets held for sale reclassification   (1,943,349)
Impairment loss $ (3,500,000) (3,520,933)
Ending Balance   $ 3,393,234