Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Net sales	$ 24,009	$ 23,960	$ 73,970	$ 70,831
Disposables
Net sales	12,740	13,030	40,880	39,490
Chemical
Net sales	4,740	3,980	12,420	10,530
Fire
Net sales	1,020	1,270	3,570	4,520
Gloves
Net sales	770	830	2,300	2,260
Hi-Vis
Net sales	1,830	2,070	5,460	5,960
Wovens
Net sales	2,910	2,780	9,340	8,070
USA
Net sales	11,820	12,850	3,754	38,180
Other Foreign
Net sales	4,410	4,390	1,360	12,470
Europe (UK)
Net sales	2,220	2,240	7,350	6,420
Mexico
Net sales	770	510	2,700	1,660
China
Net sales	$ 4,790	$ 3,970	$ 12,780	$ 12,100