Condensed Consolidated Statements of Income Unaudited - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2019	Oct. 31, 2018
Income Statement [Abstract]
Net sales	$ 66,998	$ 76,809	$ 164,250	$ 174,180
Costs of goods sold	40,153	50,379	99,582	112,933
Gross profit	26,845	26,430	64,668	61,247
Selling, general and administrative expenses	20,476	21,469	51,714	51,900
Gain on sale of property, plant & equipment	0	0	3	(1)
Operating Income	6,369	4,961	12,951	9,348
Pension expense	188	296	564	856
Interest expense	603	630	2,210	1,898
Income (loss) before income taxes	5,578	4,035	10,177	6,594
Income tax (benefit) expense	1,686	1,103	3,485	1,759
Net income (loss)	$ 3,892	$ 2,932	$ 6,692	$ 4,835
Net income (loss) per common share:
Basic (usd per share)	$ 0.25	$ 0.19	$ 0.43	$ 0.31
Diluted (usd per share)	$ 0.25	$ 0.19	$ 0.43	$ 0.31
Weighted average shares outstanding:
Basic (shares)	15,654	15,486	15,568	15,399
Diluted (shares)	15,710	15,582	15,621	15,491