Net Income (Loss) per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2019	Oct. 31, 2018
Earnings Per Share [Abstract]
Net income (loss)	$ 3,892	$ 2,932	$ 6,692	$ 4,835
Weighted average shares outstanding (shares)	15,654	15,486	15,568	15,399
Net effect of dilutive share-based on the treasury stock method using average market price (shares)	56	96	53	92
Totals (shares)	15,710	15,582	15,621	15,491
Net income (loss) per share - basic (usd per share)	$ 0.25	$ 0.19	$ 0.43	$ 0.31
Net income (loss) per share - diluted (usd per share)	$ 0.25	$ 0.19	$ 0.43	$ 0.31