Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Net sales	$ 25,616	$ 23,909	$ 49,960	$ 46,870
Disposables
Net sales	13,110	12,360	25,960	24,520
Chemical
Net sales	4,720	4,030	9,150	7,820
Fire
Net sales	1,700	2,020	3,360	4,020
Gloves
Net sales	850	820	1,650	1,560
Hi-Vis
Net sales	1,970	2,110	3,640	3,880
Wovens
Net sales	3,270	2,570	6,200	5,070
USA
Net sales	13,360	12,630	25,710	25,330
Other Foreign
Net sales	4,840	4,380	9,200	8,080
Europe (UK)
Net sales	2,560	2,080	5,130	4,170
Mexico
Net sales	820	580	1,930	1,150
China
Net sales	$ 4,040	$ 4,240	$ 7,990	$ 8,140