Quarterly Financial Information (Unaudited) - Selected Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Feb. 03, 2018	Oct. 28, 2017	Jul. 29, 2017	Apr. 29, 2017	Jan. 28, 2017	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Feb. 03, 2018	Jan. 28, 2017	Jan. 30, 2016
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 164,317	$ 152,824	$ 138,810	$ 120,947	$ 160,216	$ 152,106	$ 136,412	$ 120,218	$ 576,899	$ 568,952	$ 550,991
Gross profit	51,440	50,094	40,929	32,905	49,066	47,969	38,837	32,587	175,370	168,459	167,246
Operating (loss) income	11,441	14,112	(1,239)	(329)	10,398	10,667	2,232	(3,967)	23,986	19,330	18,096
Net income	$ 6,699	$ 8,757	$ (596)	$ (161)	$ 6,305	$ 6,417	$ 1,433	$ (2,745)	$ 14,700	$ 11,410	$ 7,541
Basic earnings per share (in dollars per share)	$ 0.23	$ 0.30	$ (0.02)	$ (0.01)	$ 0.22	$ 0.23	$ 0.05	$ (0.10)
Diluted earnings per share (in dollars per share)	$ 0.23	$ 0.30	$ (0.02)	$ (0.01)	$ 0.22	$ 0.22	$ 0.05	$ (0.10)