Note 13 - Business Segment Information - Revenue by Region (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Jan. 31, 2020	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Revenues		$ 78,552	$ 77,807	$ 76,378	$ 78,035	$ 82,706	$ 79,577	$ 84,543	$ 86,190	$ 310,772	$ 333,016	$ 305,018
North America		28,687				29,621				28,687	29,621
North America [Member]
Revenues										151,097	162,307	141,614
EMEA [Member]
Revenues										90,885	96,989	89,693
Asia Pacific [Member]
Revenues										46,363	51,628	50,689
Latin America [Member]
Revenues										22,427	22,092	23,022
Reportable Geographical Components [Member] | North America [Member]
Revenues	[1]									151,097	162,307	141,614
North America		23,439				24,735				23,439	24,735
Reportable Geographical Components [Member] | EMEA [Member]
Revenues										90,885	96,989	89,693
North America		3,262				3,090				3,262	3,090
Reportable Geographical Components [Member] | Asia Pacific [Member]
Revenues										46,363	51,628	50,689
North America		1,674				1,408				1,674	1,408
Reportable Geographical Components [Member] | Latin America [Member]
Revenues										22,427	22,092	$ 23,022
North America		$ 312				$ 388				$ 312	$ 388

[1] Sales into Canada accounted for 2% of North America total revenue for each of the fiscal years 2020, 2019 and 2018