Note 14 - Business Segment Information - Revenue by Region (Details) - USD ($) $ in Thousands		3 Months Ended
		Apr. 30, 2019	Apr. 30, 2018
Revenues		$ 78,035	$ 86,190
North America [Member]
Revenues		22,509	25,087
EMEA [Member]
Revenues		11,886	12,559
Asia Pacific [Member]
Revenues		5,981	8,519
Latin America [Member]
Revenues		78,035	86,190
Reportable Geographical Components [Member] | North America [Member]
Revenues	[1]	37,659	40,025
Reportable Geographical Components [Member] | EMEA [Member]
Revenues		22,509	25,087
Reportable Geographical Components [Member] | Asia Pacific [Member]
Revenues		11,886	12,559
Reportable Geographical Components [Member] | Latin America [Member]
Revenues		$ 5,981	$ 8,519

[1] Sales into Canada accounted for 3% and 2% of North America total revenue in the three months ended April 30, 2019 and 2018, respectively.