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Note 7 - Unconsolidated Affiliated Company (Tables) (Zenith Freight Lines [Member])
3 Months Ended
Feb. 28, 2015
Zenith Freight Lines [Member]
 
Note 7 - Unconsolidated Affiliated Company (Tables) [Line Items]  
Equity Method Investments [Table Text Block]
   

Quarter Ended

 
   

February 28, 2015

   

March 1, 2014

 

Earnings recognized

  $ 220     $ 65