Unaudited Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019
Income Statement [Abstract]
Net sales	$ 56,741	$ 66,998	$ 133,625	$ 164,250
Costs of goods sold	34,466	40,153	83,243	99,582
Gross profit	22,275	26,845	50,382	64,668
Selling, general and administrative expenses	16,457	20,476	43,876	51,714
(Gain) loss on sale of property, plant & equipment	(7)	0	(7)	3
Operating income	5,825	6,369	6,513	12,951
Pension expense	542	188	1,626	564
Interest expense	419	603	1,317	2,210
Income before income taxes	4,864	5,578	3,570	10,177
Income tax expense	384	1,686	235	3,485
Net income	$ 4,480	$ 3,892	$ 3,335	$ 6,692
Net income per common share:
Basic (usd per share)	$ 0.28	$ 0.25	$ 0.21	$ 0.43
Diluted (usd per share)	$ 0.28	$ 0.25	$ 0.21	$ 0.43
Weighted average shares outstanding:
Basic (shares)	15,733	15,654	15,566	15,568
Diluted (shares)	15,767	15,710	15,586	15,621