Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Operating Loss Carryforwards [Line Items]
Deferred tax valuation allowance, percentage	100.00%		100.00%
Accrued interest	$ 0	$ 0	$ 0	$ 0
Recognized income tax interest and/or penalties	$ 0	$ 0	$ 0	$ 0
Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards will begin to expire			Sep. 30, 2018
State [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards will begin to expire			Sep. 30, 2015