Note 2 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Revenues	$ 79,577	$ 76,925	$ 250,310	$ 224,265
Automotive [Member]
Revenues	31,035	29,232	102,760	84,508
Consumer Products and Food and Beverage [Member]
Revenues	12,732	11,539	40,049	34,353
High Technology and Industrial Products [Member]
Revenues	23,873	25,385	74,231	72,534
Life Sciences [Member]
Revenues	11,937	10,769	33,270	32,870
North America [Member]
Revenues	39,870	37,319	119,183	105,845
EMEA [Member]
Revenues	22,549	21,439	74,542	64,547
Asia Pacific [Member]
Revenues	12,348	12,550	37,773	37,683
Latin America [Member]
Revenues	$ 4,810	$ 5,617	$ 18,812	$ 16,190