Note 10 - Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended			3 Months Ended		6 Months Ended			12 Months Ended		3 Months Ended
	Oct. 27, 2012	Aug. 02, 2014	May 03, 2014	Feb. 02, 2013	Aug. 02, 2014 Cost of Sales [Member]	Aug. 03, 2013 Cost of Sales [Member]	Aug. 02, 2014 Cost of Sales [Member]	Aug. 03, 2013 Cost of Sales [Member]	Aug. 02, 2014 Selling and Marketing Expense [Member]	Feb. 01, 2014 Design Tool Licences [Member]	Aug. 02, 2014 Design Tool Licences [Member]	Oct. 27, 2012 Second Licensed Technology Audit Settlement [Member]
Note 10 - Commitments and Contingencies (Details) [Line Items]
Purchase Commitment, Remaining Minimum Amount Committed		$ 39.3									$ 9.5
Long-term Purchase Commitment, Amount										12.9
Contractual Obligation		0
Direct Operating Cost, Royalty Expense					0.5	0.6	1.1	1.1
Proceeds from Grantors		5.2
Percentage of Royalties		4.50%
Accrued Royalties		1.1
Payments for Other Operating Activities												0.3
Licensing Period Under Negotiation	3 years
Licensing Fees Under Negotiation				3.5
Loss Contingency Accrual			0.2
Loss Contingency, Loss in Period									$ 0.1