Note 10 - Commitments and Contingencies (Details Textual) (USD $)	3 Months Ended				3 Months Ended			9 Months Ended			12 Months Ended
	Nov. 01, 2014	Oct. 27, 2012	May 03, 2014	Feb. 02, 2013	Oct. 27, 2012 Second Licensed Technology Audit Settlement [Member]	Nov. 01, 2014 Cost of Sales [Member]	Nov. 02, 2013 Cost of Sales [Member]	Nov. 01, 2014 Cost of Sales [Member]	Nov. 02, 2013 Cost of Sales [Member]	Nov. 01, 2014 Selling and Marketing Expense [Member]	Feb. 01, 2014 Design Tool Licences [Member]	Nov. 01, 2014 Design Tool Licences [Member]
Commitments and Contingencies Disclosure [Abstract]
Licensing Fees Under Negotiation				$ 3.50
Purchase Commitment, Remaining Minimum Amount Committed	46,100,000											8,100,000
Long-term Purchase Commitment, Amount											12,900,000
Direct Operating Cost, Royalty Expense						800,000	500,000	1,900,000	1,600,000
Proceeds from Grantors	5,200,000
Percentage of Royalties	4.50%
Accrued Royalties	1,100,000
Payments for Other Operating Activities					300,000
Licensing Period Under Negotiation		3 years
Loss Contingency Accrual			200,000
Loss Contingency, Loss in Period										$ 100,000