Income Taxes - Income Tax Provision (Benefit) (Detail) - USD ($)	3 Months Ended								12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]
Federal—current									$ 84,189
Federal—deferred									(621,014)
State—current									9,902	$ 2,226	$ 1,076
State—deferred									(13,402)
Foreign—current									(2,695)
Income tax provision (benefit)	$ 31,872	$ (577,789)	$ 2,897	$ 95	$ 1,170	$ 961	$ 276	$ 800	$ (543,020)	$ 2,226	$ 1,076