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Income Taxes - Summary of Tax Rates (Detail)	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]
Federal tax benefit (provision)	(35.00%)	(35.00%)	(35.00%)
State taxes, net of federal effect	(3.20%)	(4.40%)	0.70%
Stock based compensation	(0.40%)	(0.20%)	(0.60%)
Valuation allowance	171.50%	42.50%	45.00%
Foreign rate differential	(0.30%)	(3.00%)	(2.90%)
Other	(1.30%)	(0.70%)	(0.90%)
Effective tax rate	131.30%	(0.80%)	6.30%

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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