Note 13 - Business Segment Information - Revenue by Region (Details) - USD ($) $ in Thousands		3 Months Ended
		Apr. 30, 2018	Apr. 30, 2017
Revenues		$ 86,190	$ 71,382
North America [Member]
Revenues		40,025	33,370
EMEA [Member]
Revenues		25,087	20,881
Asia Pacific [Member]
Revenues		12,559	12,166
Latin America [Member]
Revenues		8,519	4,965
Reportable Geographical Components [Member] | North America [Member]
Revenues	[1]	40,025	33,370
Reportable Geographical Components [Member] | EMEA [Member]
Revenues		25,087	20,881
Reportable Geographical Components [Member] | Asia Pacific [Member]
Revenues		12,559	12,166
Reportable Geographical Components [Member] | Latin America [Member]
Revenues		$ 8,519	$ 4,965

[1] Sales into Canada accounted for 2% and 1% of North America total revenue in the three and three months ended April 30, 2018 and 2017, respectively.