Note 2 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019
Revenues	$ 76,660	$ 77,807	$ 224,888	$ 232,220
Automotive [Member]
Revenues	24,852	28,071	71,264	84,105
Consumer Products and Food and Beverage [Member]
Revenues	12,466	11,244	37,756	35,351
High Technology and Industrial Products [Member]
Revenues	26,974	26,612	80,442	78,549
Life Sciences [Member]
Revenues	12,368	11,880	35,426	34,215
North America [Member]
Revenues	39,379	38,302	115,379	112,798
EMEA [Member]
Revenues	23,334	22,233	67,281	66,860
Asia Pacific [Member]
Revenues	9,682	11,776	28,895	35,413
Latin America [Member]
Revenues	$ 4,265	$ 5,496	$ 13,333	$ 17,149