Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Sep. 30, 2015
Income Taxes [Line Items]
Deferred tax valuation allowance, percentage	100.00%
Accrued interest or penalties	$ 0		$ 0
Recognized income tax interest and/or penalties	$ 0	$ 0
Federal [Member]
Income Taxes [Line Items]
Net operating loss carryforwards will begin to expire	Sep. 30, 2018
State [Member]
Income Taxes [Line Items]
Net operating loss carryforwards will begin to expire	Sep. 30, 2016