CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Income Statement [Abstract]
Net sales	$ 32,325	$ 26,852	$ 61,214	$ 50,353
Cost of sales	26,432	23,794	51,096	45,510
Gross profit	5,893	3,058	10,118	4,843
Operating expenses
General and administrative expenses	3,924	3,856	7,906	8,142
Selling expenses	1,321	1,307	2,463	2,623
Total operating expenses	5,245	5,163	10,369	10,765
Income/(loss) from operations	648	(2,105)	(251)	(5,922)
Interest expense, net	284	157	550	314
Income/(loss) from continuing operations before income taxes	364	(2,262)	(801)	(6,236)
Income tax expense/(benefit)	639	(564)	591	(1,049)
Net loss	$ (275)	$ (1,698)	$ (1,392)	$ (5,187)
Weighted average common shares outstanding
Basic and diluted	7,820	7,679	7,769	7,645
Loss per share
Basic and diluted	$ (0.04)	$ (0.22)	$ (0.18)	$ (0.68)