Note 2 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Revenues	$ 74,081	$ 76,378	$ 148,228	$ 154,413
Automotive [Member]
Revenues	22,275	26,962	46,412	56,034
Consumer Products and Food and Beverage [Member]
Revenues	13,476	12,128	25,290	24,107
High Technology and Industrial Products [Member]
Revenues	26,644	26,389	53,468	51,937
Life Sciences [Member]
Revenues	11,686	10,899	23,058	22,335
North America [Member]
Revenues	38,998	36,837	76,000	74,496
EMEA [Member]
Revenues	21,379	22,118	43,947	44,627
Asia Pacific [Member]
Revenues	9,571	11,751	19,213	23,637
Latin America [Member]
Revenues	$ 4,133	$ 5,672	$ 9,068	$ 11,653