CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2019	Apr. 30, 2018
Income Statement [Abstract]
Net sales	$ 24,684	$ 24,344
Cost of goods sold	17,130	14,840
Gross profit	7,554	9,504
Operating expenses	7,869	7,088
Operating profit (loss)	(315)	2,416
Other income (expense), net	(27)	(1)
Interest expense	(34)	(31)
Income (loss) before taxes	(376)	2,384
Income tax expense	89	517
Net income (loss)	$ (465)	$ 1,867
Net income (loss) per common share:
Basic	$ (0.06)	$ 0.23
Diluted	$ (0.06)	$ 0.23
Weighted average common shares outstanding:
Basic	8,013,840	8,116,199
Diluted	8,013,840	8,160,380