Note 2 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2018
Revenues	$ 76,378	$ 84,543	$ 154,413	$ 170,733	$ 170,733
Automotive [Member]
Revenues	26,962	34,663	56,034		71,725
Consumer Products and Food and Beverage [Member]
Revenues	12,128	13,527	24,107		27,317
High Technology and Industrial Products [Member]
Revenues	26,389	25,363	51,937		50,358
Life Sciences [Member]
Revenues	10,899	10,990	22,335		21,333
North America [Member]
Revenues	36,837	39,288	74,496		79,313
EMEA [Member]
Revenues	22,118	26,906	44,627		51,993
Asia Pacific [Member]
Revenues	11,751	12,866	23,637		25,425
Latin America [Member]
Revenues	$ 5,672	$ 5,483	$ 11,653		$ 14,002