Note 13 - Business Segment Information - Revenue by Region (Details) - USD ($) $ in Thousands		3 Months Ended
		Apr. 30, 2017	Apr. 30, 2016
Revenue		$ 71,382	$ 65,397
Reportable Geographical Components [Member] | North America [Member]
Revenue	[1]	33,370	29,519
Reportable Geographical Components [Member] | EMEA [Member]
Revenue		20,881	19,792
Reportable Geographical Components [Member] | Asia Pacific [Member]
Revenue		12,166	11,680
Reportable Geographical Components [Member] | Latin America [Member]
Revenue		$ 4,965	$ 4,406

[1] Sales into Canada accounted for 1% and 2% of North America total revenue in the three months ended April 30, 2017 and 2016, respectively.