CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	4 Months Ended	12 Months Ended
	Jan. 31, 2015	Jan. 30, 2016	Sep. 30, 2014	Sep. 30, 2013
Income Statement [Abstract]
Net sales	$ 165,644	$ 498,753	$ 516,959	$ 540,259
Cost of goods sold	96,667	252,713	247,501	249,298
Gross profit	68,977	246,040	269,458	290,961
Selling, general and administrative expenses	86,688	246,914	250,253	252,026
Store closing, asset impairment and asset disposal (income) expenses	4,599	(2,084)	1,469	1,441
Other charges, net	5,354	6,979	3,229
Operating income (loss)	(27,664)	(5,769)	14,507	37,494
Interest expense, net	242	1,520	404	532
Loss on extinguishment of debt				9
Income (loss) before income taxes	(27,906)	(7,289)	14,103	36,953
Income tax (benefit) provision	(10,526)	(2,806)	3,606	13,010
Net income (loss)	$ (17,380)	$ (4,483)	$ 10,497	$ 23,943
Net income (loss) per share—Basic	$ (1.28)	$ (0.33)	$ 0.78	$ 1.80
Average shares outstanding—Basic	13,541	13,596	13,451	13,272
Net income (loss) per share—Diluted	$ (1.28)	$ (0.33)	$ 0.77	$ 1.78
Average shares outstanding—Diluted	13,541	13,596	13,572	13,439