Note 7 - Intagible Assets - Acquired Intangible Assets, Subject to Amortization (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Oct. 29, 2016	Jan. 30, 2016
Developed Technology Rights [Member]
Gross value	$ 85,427	$ 85,427
Impairment	(24,614)	(24,614)
Accumulated amortization and effect of currency translation	(52,444)	(48,824)
Net value	$ 8,369	$ 11,989
Weighted average remaining amortization period	7 years 182 days	6 years 182 days
Customer Relationships [Member]
Gross value	$ 54,505	$ 54,505
Impairment	(30,486)	(30,486)
Accumulated amortization and effect of currency translation	(20,762)	(19,557)
Net value	$ 3,257	$ 4,462
Weighted average remaining amortization period	6 years	5 years 255 days
Trademarks and Other [Member]
Gross value	$ 4,078	$ 4,078
Impairment
Accumulated amortization and effect of currency translation	(3,828)	(3,739)
Net value	$ 250	$ 339
Weighted average remaining amortization period	2 years 73 days	2 years 328 days
Purchased IP-Amortizing [Member]
Gross value	$ 36,013	$ 32,838
Impairment	(5,516)	(5,516)
Accumulated amortization and effect of currency translation	(21,974)	(18,696)
Net value	$ 8,523	$ 8,626
Weighted average remaining amortization period	2 years 182 days	2 years 328 days
Acquired Intangible Assets Subtotal [Member]
Gross value	$ 180,023	$ 176,848
Impairment	(60,616)	(60,616)
Accumulated amortization and effect of currency translation	(99,008)	(90,816)
Net value	$ 20,399	$ 25,416
Weighted average remaining amortization period	5 years 36 days	5 years 36 days
Purchased Intellectual Property - not yet deployed [Member]
Gross value	$ 15,506	$ 15,774
Impairment	(4,440)	(4,140)
Accumulated amortization and effect of currency translation
Net value	11,066	11,634
Gross value	195,529	192,622
Impairment	(65,056)	(64,756)
Accumulated amortization and effect of currency translation	(99,008)	(90,816)
Net value	$ 31,465	$ 37,050