Unaudited Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020
Income Statement [Abstract]
Net sales	$ 57,331	$ 57,221	$ 144,720	$ 134,494
Costs of goods sold	37,032	34,946	94,414	84,112
Gross profit	20,299	22,275	50,306	50,382
Selling, general and administrative expenses	17,782	16,457	46,016	43,876
Gain on sale of property, plant & equipment	0	(7)	0	(7)
Operating income	2,517	5,825	4,290	6,513
Pension expense	570	542	1,800	1,626
Interest expense	327	419	979	1,317
Income (loss) before income taxes	1,620	4,864	1,511	3,570
Income tax expense (benefit)	295	384	335	235
Net income (loss)	$ 1,325	$ 4,480	$ 1,176	$ 3,335
Net income (loss) per common share
Basic (usd per share)	$ 0.08	$ 0.28	$ 0.07	$ 0.21
Diluted (usd per share)	$ 0.08	$ 0.28	$ 0.07	$ 0.21
Weighted average shares of common stock outstanding:
Basic (shares)	16,033	15,733	15,927	15,566
Diluted (shares)	16,082	15,767	15,963	15,586