Note 2 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Revenues	$ 84,839	$ 74,081	$ 167,810	$ 148,228
Automotive [Member]
Revenues	25,485	22,275	49,053	46,412
Consumer Products and Food and Beverage [Member]
Revenues	13,684	13,476	27,088	25,290
High Technology and Industrial Products [Member]
Revenues	31,390	26,644	61,459	53,468
Life Sciences and Other [Member]
Revenues	14,280	11,686	30,210	23,058
North America [Member]
Revenues	41,506	38,998	80,746	76,000
EMEA [Member]
Revenues	27,342	21,379	56,055	43,947
Asia Pacific [Member]
Revenues	10,908	9,571	21,176	19,213
Latin America [Member]
Revenues	$ 5,083	$ 4,133	$ 9,833	$ 9,068