Note 6 - Intangible Assets - Acquired Intangible Assets, Subject to Amortization (Details) $ in Thousands	12 Months Ended
	Feb. 03, 2018 USD ($)
Gross value	$ 200,813
Impairment	(90,759)
Accumulated amortization and effect of currency translation	(105,424)
Net value	$ 2,551
Weighted average remaining amortization period (Year)
Net value	$ 4,630
Less: Assets held for sale	(2,079)
Developed Technology Rights [Member]
Gross value	85,427
Impairment	(31,029)
Accumulated amortization and effect of currency translation	(54,398)
Net value
Weighted average remaining amortization period (Year)
Customer Relationships [Member]
Gross value	$ 54,505
Impairment	(33,065)
Accumulated amortization and effect of currency translation	(21,440)
Net value
Weighted average remaining amortization period (Year)
Trademarks and Other [Member]
Gross value	$ 4,078
Impairment
Accumulated amortization and effect of currency translation	(3,978)
Net value	$ 100
Weighted average remaining amortization period (Year)	302 days
Purchased IP-Amortizing [Member]
Gross value	$ 38,250
Impairment	(9,722)
Accumulated amortization and effect of currency translation	(25,608)
Net value	$ 2,920
Weighted average remaining amortization period (Year)	270 days
Acquired Intangible Assets Subtotal [Member]
Gross value	$ 182,260
Impairment	(73,816)
Accumulated amortization and effect of currency translation	(105,424)
Net value	$ 3,020
Weighted average remaining amortization period (Year)
Purchased Intellectual Property - Not Yet Deployed [Member]
Gross value	$ 18,553
Impairment	(16,943)
Accumulated amortization and effect of currency translation
Net value	$ 1,610
Weighted average remaining amortization period (Year)