Note 19 - Income taxes (Details) In Millions, except Per Share data, unless otherwise specified	12 Months Ended						12 Months Ended	0 Months Ended		12 Months Ended
	Feb. 01, 2014 USD ($)	Feb. 02, 2013 USD ($)	Feb. 01, 2014 Domestic Tax Authority [Member] Additional Paid-in Capital [Member] USD ($)	Feb. 01, 2014 Domestic Tax Authority [Member] USD ($)	Feb. 01, 2014 State and Local Jurisdiction [Member] Additional Paid-in Capital [Member] USD ($)	Feb. 01, 2014 State and Local Jurisdiction [Member] USD ($)	Feb. 01, 2014 Israeli and Singaporean Authorities [Member] USD ($)	Feb. 02, 2013 Danish Taxing Authorities [Member] USD ($)	Feb. 28, 2013 Danish Taxing Authorities [Member] DKK	Jan. 28, 2012 Singapore [Member] USD ($)	Jan. 29, 2011 Singapore [Member] USD ($)	Jan. 30, 2010 Singapore [Member] USD ($)	Jan. 31, 2009 Singapore [Member] USD ($)	Feb. 01, 2014 Israel [Member] USD ($)	Feb. 02, 2013 Israel [Member] USD ($)	Jan. 28, 2012 Israel [Member] USD ($)	Feb. 01, 2014 Additional Paid-in Capital [Member] USD ($)
Note 19 - Income taxes (Details) [Line Items]
Valuation Allowances and Reserves, Period Increase (Decrease)	$ (6.8)
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	22.1																13.6
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	34.4																3.4
Deferred Tax Assets, Tax Credit Carryforwards, Research			12.5	16.2	2.3	16.3
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	15.9
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	6.8
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	1.0	0.3
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	0.3	1.3
Unrecognized Tax Benefits, Period Increase (Decrease)							(9.3)
Tax Adjustments, Settlements, and Unusual Provisions							(4.3)	1.1
Settlement to Reduce Net Operating Losses (in Kroner)									75
Undistributed Earnings of Foreign Subsidiaries	28.7
Income Tax Holiday, Aggregate Dollar Amount										$ 2.0	$ 6.7	$ 7.0	$ 6.5	$ 3.1	$ 3.4	$ 2.0
Income Tax Holiday, Income Tax Benefits Per Share (in Dollars per share)										$ 0.06	$ 0.21	$ 0.25	$ 0.23	$ 0.09	$ 0.10	$ 0.06
Number of Years Exempt From Tax on Income														2 years
Number of Years Suject to Reduced Corporate Tax Rate														8 years