Net income per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019
Earnings Per Share [Abstract]
Net income	$ 4,480	$ 3,892	$ 3,335	$ 6,692
Weighted average shares outstanding - basic (shares)	15,733	15,654	15,566	15,568
Net effect of dilutive share-based on the treasury stock method using average market price (shares)	34	56	20	53
Totals (shares)	15,767	15,710	15,586	15,621
Net income (loss) per share - basic (usd per share)	$ 0.28	$ 0.25	$ 0.21	$ 0.43
Net income (loss) per share - diluted (usd per share)	$ 0.28	$ 0.25	$ 0.21	$ 0.43