Note 12 - Business Segment Information - Revenue by Region (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Oct. 31, 2017	Jul. 31, 2017	Apr. 30, 2017	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017	Feb. 01, 2018
Revenues		$ 82,706	$ 79,577	$ 84,543	$ 86,190	$ 80,753	$ 76,925	$ 75,958	$ 71,382	$ 333,016	$ 305,018	$ 277,973
Property and equipment, net		29,621				30,408				29,621	30,408		$ 30,408
North America [Member]
Revenues										162,307	141,614	129,436
EMEA [Member]
Revenues										96,989	89,693	81,765
Asia Pacific [Member]
Revenues										51,628	50,689	47,742
Latin America [Member]
Revenues										22,092	23,022	19,030
Reportable Geographical Components [Member] | North America [Member]
Revenues	[1]									162,307	141,614	129,436
Property and equipment, net		24,735				25,546				24,735	25,546
Reportable Geographical Components [Member] | EMEA [Member]
Revenues										96,989	89,693	81,765
Property and equipment, net		3,090				3,444				3,090	3,444
Reportable Geographical Components [Member] | Asia Pacific [Member]
Revenues										51,628	50,689	47,742
Property and equipment, net		1,408				1,141				1,408	1,141
Reportable Geographical Components [Member] | Latin America [Member]
Revenues										22,092	23,022	$ 19,030
Property and equipment, net		$ 388				$ 277				$ 388	$ 277

[1] Sales into Canada accounted for 2% of North America total revenue for each of the fiscal years 2019, 2018 and 2017.