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Note 8 - Notes Payable and Bank Credit Facility (Details Textual) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Aug. 26, 2017	Aug. 25, 2018	Aug. 26, 2017	Nov. 25, 2017
Long-term Debt, Total		$ 436		$ 3,734
Long-term Debt, Current Maturities, Total		436		3,405
Bank One [Member]
Line of Credit Facility, Maximum Borrowing Capacity		15,000
Letters of Credit Outstanding, Amount		1,382
Line of Credit Facility, Remaining Borrowing Capacity		13,618
Bank Two [Member]
Letters of Credit Outstanding, Amount		381
Real Estate Notes Payable Operated in Retail Segment [Member]
Long-term Debt, Total		$ 436		747
Debt Instrument, Interest Rate, Stated Percentage		6.73%
Long-term Debt, Current Maturities, Total		$ 436		418
Real Estate Notes Payable Operated in Retail Segment [Member] \| Financed Through Commercial Mortgages [Member]
Debt Instrument, Collateral Amount		5,631		$ 5,727
Zenith Freight Lines [Member] \| Unsecured Debt [Member]
Amortization of Debt Discount (Premium)	$ 19	$ 13	$ 76