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Note 10 - Acquisitions (Tables)
9 Months Ended
Sep. 30, 2015
Dallas Truck Center, Inc. [Member]  
Notes Tables  
Schedule of Business Acquisitions, by Acquisition [Table Text Block]
Property
  $ 2,308  
Inventory
    949  
         
Total
  $ 3,257  
Schedule of Business Acquisitions, by Acquisition [Table Text Block]
Property, equipment and capital lease assets
  $ 16,430  
Inventory
    3,662  
Prepaid expenses
    295  
Other
    60  
Accrued expenses
    (172 )
Capital lease obligations
    (16,925 )
         
Total
  $ 3,350