Note 2 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 31, 2021	Oct. 31, 2020	Jul. 31, 2020	Apr. 30, 2020	Jan. 31, 2020	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Revenues	$ 82,977	$ 76,660	$ 74,081	$ 74,147	$ 78,552	$ 77,807	$ 76,378	$ 78,035	$ 307,865	$ 310,772	$ 333,016
Automotive [Member]
Revenues									95,009	110,900	128,249
Consumer Products and Food and Beverage [Member]
Revenues									51,682	46,915	53,637
High Technology and Industrial Products [Member]
Revenues									111,056	106,807	106,658
Life Sciences and Other [Member]
Revenues									50,118	46,150	44,472
North America [Member]
Revenues									155,244	151,097	162,307
EMEA [Member]
Revenues									93,351	90,885	96,989
Asia Pacific [Member]
Revenues									39,327	46,363	51,628
Latin America [Member]
Revenues									$ 19,943	$ 22,427	$ 22,092