Note 10 - Financial Instruments and Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Aug. 25, 2012	Aug. 31, 2013
Note 10 - Financial Instruments and Fair Value Measurements (Details) [Line Items]
Certificates of Deposit, Weighted Average Yield		0.224%
Certificates of Deposit Weighted Average Remaining Time to Maturity		8 months
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net (in Dollars)	$ 806
Minimum [Member]
Note 10 - Financial Instruments and Fair Value Measurements (Details) [Line Items]
Certificates of Deposit, Term		6 months
Certificates of Deposit Interest Rate		0.12%
Maximum [Member]
Note 10 - Financial Instruments and Fair Value Measurements (Details) [Line Items]
Certificates of Deposit Interest Rate		1.00%