Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive (Loss) Income [Member]
Balance, Beginning of Period at Jan. 31, 2014	$ 35,533	$ 13	$ 85,201	$ (49,721)	$ 0	$ 40
Balance, Beginning of Period, Shares at Jan. 31, 2014		13,388,712			32,502
Stock options exercised and restricted stock units vested	757	$ 1	756
Stock options exercised and restricted stock units vested, Shares		486,032
Share-based compensation expense	2,224		2,224
Net loss	(19,157)			(19,157)
Cumulative translation adjustments	(466)					(466)
Balance, End of Period at Jan. 31, 2015	18,891	$ 14	88,181	(68,878)	$ 0	(426)
Balance, End of Period, Shares at Jan. 31, 2015		13,874,744			32,502
Stock options exercised, warrants exercised, and restricted stock units vested	1,184	$ 1	1,183
Stock options exercised, warrants exercised, and restricted stock units vested, Shares		788,877
Share-based compensation expense	2,262		2,262
Net loss	(4,807)			(4,807)
Cumulative translation adjustments	(43)					(43)
Balance, End of Period at Jan. 31, 2016	17,487	$ 15	91,626	(73,685)	$ 0	(469)
Balance, End of Period, Shares at Jan. 31, 2016		14,663,621			32,502
Restricted stock units vested	(13)	$ 0			$ (13)
Restricted stock units vested, Shares		27,367			943
Stock options exercised	$ 890	$ 0	877		$ 13
Stock options exercised, Shares	236,384	235,441			(943)
Share-based compensation expense	$ 2,013		2,013
Net loss	(1,132)			(1,132)
Cumulative translation adjustments	(71)					(71)
Balance, End of Period at Jan. 31, 2017	$ 19,174	$ 15	$ 94,516	$ (74,817)	$ 0	$ (540)
Balance, End of Period, Shares at Jan. 31, 2017		14,926,429			32,502