Note 2 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jan. 31, 2020	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Revenues	$ 78,552	$ 77,807	$ 76,378	$ 78,035	$ 82,706	$ 79,577	$ 84,543	$ 86,190	$ 310,772	$ 333,016	$ 305,018
Automotive [Member]
Revenues									110,900	128,249	113,579
Consumer Products and Food and Beverage [Member]
Revenues									46,915	53,637	47,273
High Technology and Industrial Products [Member]
Revenues									106,807	106,658	99,990
Life Sciences and Other [Member]
Revenues									46,150	44,472	44,176
North America [Member]
Revenues									151,097	162,307	141,614
EMEA [Member]
Revenues									90,885	96,989	89,693
Asia Pacific [Member]
Revenues									46,363	51,628	50,689
Latin America [Member]
Revenues									$ 22,427	$ 22,092	$ 23,022