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Note 12 - Discontinued Operations (Details Textual) - Discontinued Operations, Disposed of by Sale [Member] - Zenith Freight Lines [Member] - USD ($)
3 Months Ended 9 Months Ended
Aug. 27, 2022
Aug. 28, 2021
Aug. 27, 2022
Aug. 28, 2021
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax, Net of Working Capital Adjustment $ 53,254,000      
Disposal Group, Service Agreement with Buyer for Continuation of Services, Term (Year)   7 years   7 years
Disposal Group, Including Discontinued Operation, Interest Expense   $ 86,000 $ 78,000 $ 12,000
Subsidiaries [Member] | Logistical Services [Member]        
Related Party Transaction, Amounts of Transaction   $ 7,164,000 9,121,000 $ 16,245
Disposal Group, Including Discontinued Operation, Operating Expense $ 10,307,000   19,852,000  
Discontinued Operation, Amount of Continuing Cash Flows after Disposal     $ 17,818