Condensed Consolidated Statement of Shareholders' Equity (Unaudited) - 9 months ended Oct. 28, 2017 - USD ($) $ in Thousands	Total	Common Stock	Accumulated Deficit
Balance, beginning of period at Jan. 28, 2017	$ 133,813	$ 165,245	$ (31,432)
Balance, beginning of period (in shares) at Jan. 28, 2017	15,906,635	15,906,635
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee stock purchase plan	$ 253	$ 253
Issuance of common stock under employee stock purchase plan (in shares)		28,179
Exercise of stock options (in shares)		28,346
Restricted stock issued (in shares)		101,979
Net share settlement of stock options and restricted stock units	$ (201)	$ (201)
Net share settlement of stock options and restricted stock units (in shares)		(43,851)
Repurchase and retirement of common stock (in shares)	(18,901)	(18,901)
Repurchase and retirement of common stock	$ (218)		(218)
Stock-based compensation expense	1,766	$ 1,766
Net loss	(7,569)		(7,569)
Balance, end of period at Oct. 28, 2017	$ 127,844	$ 167,063	$ (39,219)
Balance, end of period (in shares) at Oct. 28, 2017	16,002,387	16,002,387