Income Taxes - Summary of Effective Income Tax Rate Reconciliation (Detail)	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]
At U.S. federal statutory rate	34.00%	34.00%
State taxes, net of federal effect	7.60%	10.30%
Stock compensation	(0.10%)	(1.10%)
Mark-to-market adjustments	(3.50%)	(5.80%)
Other permanent items	(0.10%)	0.00%
Valuation allowance	(5.20%)	(37.40%)
Write-off of net operating losses	(32.70%)	0.00%
Effective income tax rate	0.00%	0.00%