Note 7 - Acquired Intangible Assets, Subject to Amortization (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jul. 30, 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	(51,244)	(48,824)
Net value	$ 9,569	$ 11,989
Weighted average remaining amortization period	7 years 36 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	(20,363)	(19,557)
Net value	$ 3,656	$ 4,462
Weighted average remaining amortization period	5 years 292 days	5 years 255 days
Trademarks and Other [Member]
Gross value	$ 4,078	$ 4,078
Impairment
Accumulated amortization and effect of currency translation	(3,798)	(3,739)
Net value	$ 280	$ 339
Weighted average remaining amortization period	2 years 146 days	2 years 328 days
Purchased IP-Amortizing [Member]
Gross value	$ 36,017	$ 32,838
Impairment	(5,516)	(5,516)
Accumulated amortization and effect of currency translation	(20,873)	(18,696)
Net value	$ 9,628	$ 8,626
Weighted average remaining amortization period	2 years 255 days	2 years 328 days
Acquired Intangible Assets Subtotal [Member]
Gross value	$ 180,027	$ 176,848
Impairment	(60,616)	(60,616)
Accumulated amortization and effect of currency translation	(96,278)	(90,816)
Net value	$ 23,133	$ 25,416
Weighted average remaining amortization period	5 years	5 years 36 days
Purchased Intellectual Property - not yet deployed [Member]
Gross value	$ 15,295	$ 15,774
Impairment	(4,440)	(4,140)
Accumulated amortization and effect of currency translation
Net value	$ 10,855	11,634
Weighted average remaining amortization period
Gross value	$ 195,322	192,622
Impairment	(65,056)	(64,756)
Accumulated amortization and effect of currency translation	(96,278)	(90,816)
Net value	$ 33,988	$ 37,050
Weighted average remaining amortization period