Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018
Net sales	$ 27,472	$ 25,616	$ 52,156	$ 49,960
Disposables
Net sales	14,300	13,110	26,660	25,960
Chemical
Net sales	5,560	4,720	10,620	9,150
Fire
Net sales	2,430	1,700	3,830	3,360
Gloves
Net sales	840	850	1,590	1,650
Hi-Vis
Net sales	2,620	1,970	5,610	3,640
Wovens
Net sales	1,720	3,270	3,850	6,200
USA
Net sales	14,440	13,360	27,310	25,710
Other Foreign
Net sales	920	660	1,680	1,490
Europe (UK)
Net sales	2,480	2,560	4,870	5,130
Mexico
Net sales	590	820	1,200	1,930
Asia
Net sales	4,040	4,130	7,870	8,080
Canada
Net sales	2,370	2,100	4,870	4,300
Latin America
Net sales	$ 2,630	$ 1,990	$ 4,360	$ 3,320