Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2019	Oct. 31, 2018
Net sales	$ 27,464	$ 24,009	$ 79,620	$ 73,970
Disposables
Net sales	12,520	12,740	39,190	40,880
Chemical
Net sales	5,680	4,740	16,300	12,420
Fire
Net sales	2,810	1,020	6,640	3,570
Gloves
Net sales	740	770	2,330	2,300
Hi-Vis
Net sales	2,200	1,830	6,040	5,460
Wovens
Net sales	3,510	2,910	9,120	9,340
USA
Net sales	14,160	11,820	41,470	37,540
Other Foreign
Net sales	910	720	2,610	2,300
Europe (UK)
Net sales	2,380	2,220	7,240	7,350
Mexico
Net sales	880	770	2,080	2,700
Asia
Net sales	4,620	4,800	12,490	12,790
Canada
Net sales	2,600	2,080	7,470	6,380
Latin America
Net sales	$ 1,910	$ 1,600	$ 6,260	$ 4,910