Note 14 - Business Segment Information - Revenue by Region (Details) - USD ($) $ in Thousands		3 Months Ended
		Apr. 30, 2021	Apr. 30, 2020
Revenues		$ 82,971	$ 74,147
North America [Member]
Revenues		39,240	37,002
EMEA [Member]
Revenues		28,713	22,568
Asia Pacific [Member]
Revenues		10,268	9,642
Latin America [Member]
Revenues		4,750	4,935
Reportable Geographical Components [Member] | North America [Member]
Revenues	[1]	39,240	37,002
Reportable Geographical Components [Member] | EMEA [Member]
Revenues		28,713	22,568
Reportable Geographical Components [Member] | Asia Pacific [Member]
Revenues		10,268	9,642
Reportable Geographical Components [Member] | Latin America [Member]
Revenues		$ 4,750	$ 4,935

[1] Sales into Canada accounted for 3% and 2% of North America total revenue in the three months ended April 30, 2021 and 2020, respectively.