Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								4 Months Ended	12 Months Ended
	Jan. 28, 2017	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Jan. 30, 2016	Oct. 31, 2015	Aug. 01, 2015	May 02, 2015	Jan. 31, 2015	Jan. 28, 2017	Jan. 30, 2016	Sep. 30, 2014
Quarterly financial results
Net sales	$ 100,158	$ 102,582	$ 106,529	$ 124,430	$ 118,287	$ 119,548	$ 119,306	$ 141,612	$ 165,644	$ 433,699	$ 498,753	$ 516,959
Gross profit	51,038	54,288	54,830	67,272	58,928	60,401	55,308	71,403	68,977	227,428	246,040	269,458
Net income (loss)	$ (32,786)	$ (1,506)	$ (2,509)	$ 4,041	$ (3,062)	$ (1,274)	$ (2,682)	$ 2,535	$ (17,380)	$ (32,760)	$ (4,483)	$ 10,497
Net income (loss) per share—Basic	$ (2.39)	$ (0.11)	$ (0.18)	$ 0.30	$ (0.22)	$ (0.09)	$ (0.20)	$ 0.19	$ (1.28)	$ (2.39)	$ (0.33)	$ 0.78
Net income (loss) per share—Diluted	$ (2.39)	$ (0.11)	$ (0.18)	$ 0.30	$ (0.22)	$ (0.09)	$ (0.20)	$ 0.19	$ (1.28)	$ (2.39)	$ (0.33)	$ 0.77