Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								4 Months Ended	12 Months Ended
	Jan. 30, 2016	Oct. 31, 2015	Aug. 01, 2015	May. 02, 2015	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Jan. 31, 2015	Jan. 30, 2016	Sep. 30, 2014	Sep. 30, 2013
Quarterly financial results
Net sales	$ 118,287	$ 119,548	$ 119,306	$ 141,612	$ 122,048	$ 134,020	$ 126,053	$ 134,838	$ 165,644	$ 498,753	$ 516,959	$ 540,259
Gross profit	58,928	60,401	55,308	71,403	60,186	69,599	68,518	71,155	68,977	246,040	269,458	290,961
Net income (loss)	$ (3,062)	$ (1,274)	$ (2,682)	$ 2,535	$ (2,485)	$ 5,476	$ 3,247	$ 4,259	$ (17,380)	$ (4,483)	$ 10,497	$ 23,943
Net income (loss) per share—Basic	$ (0.23)	$ (0.09)	$ (0.20)	$ 0.19	$ (0.18)	$ 0.41	$ 0.24	$ 0.32	$ (1.28)	$ (0.33)	$ 0.78	$ 1.80
Net income (loss) per share—Diluted	$ (0.23)	$ (0.09)	$ (0.20)	$ 0.19	$ (0.18)	$ 0.40	$ 0.24	$ 0.31	$ (1.28)	$ (0.33)	$ 0.77	$ 1.78