Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	4 Months Ended	12 Months Ended
	Jan. 31, 2015	Jan. 30, 2016	Sep. 30, 2014	Sep. 30, 2013
Income Tax Disclosure [Abstract]
Benefit of state net operating loss carryforwards, net of federal effect, from change in tax regulations				$ (1,216)
Increase deferred tax assets excluding state net operating loss carryforwards		$ 682
Unrecognized tax benefits related to uncertain income tax positions		351
Unrecognized tax benefits related to uncertain income tax position accrued interest and penalties	$ (29)	(83)	$ (1,391)	$ 341
Recognized liabilities for unrecognized tax benefits that impact effective tax rate		719
Recoverable income taxes	$ 6,778	5,859	$ 2,542
Gross unrecognized tax benefits decrease for uncertain tax positions		100
Approximate gross unrecognized tax benefit that would impact the effective tax rate		$ 73