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Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)
12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2013
Disclosure - Goodwill and Intangible Assets - Additional Information (Detail) [Line Items]      
Goodwill $ 2,872,677 $ 0  
Goodwill impairment 0    
Amortization of intangible assets $ 172,429 $ 0 $ 0
Minimum [Member]      
Disclosure - Goodwill and Intangible Assets - Additional Information (Detail) [Line Items]      
Estimated useful lives of intangible assets 5 years    
Maximum [Member]      
Disclosure - Goodwill and Intangible Assets - Additional Information (Detail) [Line Items]      
Estimated useful lives of intangible assets 6 years