Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Intangible Assets Net Excluding Goodwill [Abstract]
Intangible assets subject to amortization, beginning balance			$ 22,164,868
Intangible assets subject to amortization, Amortization	$ (425,107)	$ (425,107)	(1,275,322)	$ (1,289,206)
Intangible assets subject to amortization, ending balance	$ 20,889,546		$ 20,889,546