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Note 7 - Unconsolidated Affiliated Company (Tables)
9 Months Ended
Aug. 29, 2015
Zenith Freight Lines [Member]  
Notes Tables  
Equity Method Investments [Table Text Block]
 
 
Quarter Ended
 
 
Nine Months Ended
 
 
 
August 29,
2015
 
 
August 30,
2014
 
 
August 29,
2015
 
 
August 30, 2014
 
 
Earnings recognized
  $ -     $ 190     $ 220     $ 534