Income Taxes - Summary of Effective Income Tax Rate Reconciliation (Detail)	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Income Tax Disclosure [Abstract]
At U.S. federal statutory rate	34.00%	34.00%
State taxes, net of federal effect	9.30%	7.60%
Stock compensation	(0.70%)	(0.10%)
Mark-to-market adjustments	0.70%	(3.50%)
Write-off of net operating losses	(0.00%)	(32.70%)
Valuation allowance	(43.40%)	(5.20%)
Other	0.10%	(0.10%)
Effective income tax rate	0.00%	0.00%