Note 13 - Business Segment Information - Revenue by Region (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Revenues		$ 74,081	$ 76,378	$ 148,228	$ 154,413
North America [Member]
Revenues		38,998	36,837	76,000	74,496
EMEA [Member]
Revenues		21,379	22,118	43,947	44,627
Asia Pacific [Member]
Revenues		9,571	11,751	19,213	23,637
Latin America [Member]
Revenues		4,133	5,672	9,068	11,653
Reportable Geographical Components [Member] | North America [Member]
Revenues	[1]	38,998	36,837	76,000	74,496
Reportable Geographical Components [Member] | EMEA [Member]
Revenues		21,379	22,118	43,947	44,627
Reportable Geographical Components [Member] | Asia Pacific [Member]
Revenues		9,571	11,751	19,213	23,637
Reportable Geographical Components [Member] | Latin America [Member]
Revenues		$ 4,133	$ 5,672	$ 9,068	$ 11,653

[1] Sales into Canada accounted for 2% of North America total revenue in the three and six months ended July 31, 2020 and for 2% and 3% of North America total revenue in the three and six months ended July 31, 2019, respectively.