Net Income (Loss) per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Earnings Per Share [Abstract]
Net income (loss)	$ 7,450	$ 5,203	$ 4,274	$ 1,348
Weighted average shares outstanding	14,887	14,725	14,856	14,687
Net effect of dilutive share-based on the treasury stock method using average market price	289	149	283	152
Totals	15,176	14,874	15,139	14,839
Net income (loss) per share - basic	$ 0.50	$ 0.35	$ 0.29	$ 0.09
Net income (loss) per share - diluted	$ 0.49	$ 0.35	$ 0.28	$ 0.09