Net Income (Loss) per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Earnings Per Share [Abstract]
Net income (loss)	$ 2,932	$ 2,524	$ 4,835	$ 5,341
Weighted average shares outstanding (shares)	15,486	15,317	15,399	15,220
Net effect of dilutive share-based on the treasury stock method using average market price (shares)	96	166	92	104
Totals (shares)	15,582	15,483	15,491	15,324
Net income (loss) per share - basic (usd per share)	$ 0.19	$ 0.16	$ 0.31	$ 0.35
Net income (loss) per share - diluted (usd per share)	$ 0.19	$ 0.16	$ 0.31	$ 0.35