Note 14 - Business Segment Information - Revenue by Region (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2019	Jul. 31, 2018	Jul. 31, 2018
Revenues		$ 76,378	$ 84,543	$ 154,413	$ 170,733	$ 170,733
North America [Member]
Revenues		36,837	39,288	74,496		79,313
EMEA [Member]
Revenues		22,118	26,906	44,627		51,993
Asia Pacific [Member]
Revenues		11,751	12,866	23,637		25,425
Latin America [Member]
Revenues		5,672	5,483	11,653		$ 14,002
Reportable Geographical Components [Member] | North America [Member]
Revenues	[1]	36,837	39,288	74,496	79,313
Reportable Geographical Components [Member] | EMEA [Member]
Revenues		22,118	26,906	44,627	51,993
Reportable Geographical Components [Member] | Asia Pacific [Member]
Revenues		11,751	12,866	23,637	25,425
Reportable Geographical Components [Member] | Latin America [Member]
Revenues		$ 5,672	$ 5,483	$ 11,653	$ 14,002

[1] Sales into Canada accounted for 2% and 3% of North America total revenue in the three and six months ended July 31, 2019, respectively and for 1% and 2% of North America total revenue in the three and six months ended July 31, 2018, respectively.