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Note 8 - Notes Payable and Bank Credit Facility (Details Textual)		3 Months Ended		9 Months Ended
	Feb. 02, 2015 USD ($)	Aug. 26, 2017 USD ($)	Aug. 27, 2016 USD ($)	Aug. 26, 2017 USD ($)	Aug. 27, 2016 USD ($)	May 27, 2017	Nov. 26, 2016 USD ($)
Long-term Debt, Current Maturities		$ 3,373,000		$ 3,373,000			$ 3,290,000
Long-term Debt		3,900,000		3,900,000			7,111,000
Bank One [Member]
Line of Credit Facility, Remaining Borrowing Capacity		13,028,000		13,028,000
Line of Credit Facility, Maximum Borrowing Capacity		15,000,000		15,000,000
Letters of Credit Outstanding, Amount		1,972,000		1,972,000
Bank Two [Member]
Letters of Credit Outstanding, Amount		511,000		511,000
Real Estate Notes Payable Operated in Retail Segment [Member]
Long-term Debt		932,000		932,000			1,219,000
Debt Instrument, Interest Rate, Stated Percentage						6.73%
Secured Debt, Current		405,000		405,000			385,000
Real Estate Notes Payable Operated in Retail Segment [Member] \| Financed Through Commercial Mortgages [Member]
Debt Instrument, Collateral Amount		5,759,000		5,759,000			5,858,000
Zenith Freight Lines [Member] \| Unsecured Debt [Member]
Debt Instrument, Face Amount	$ 9,000,000
Debt Instrument, Number of Annual Payments	3
Debt Instrument, Periodic Payment	$ 3,000,000
Amortization of Debt Discount (Premium)		19,000	$ 46,000	76,000	$ 158,000
Long-term Debt, Current Maturities		$ 2,968,000		$ 2,968,000			$ 2,904