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Note 4 - Derivative Instruments and Hedging Activities (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule Of Derivative Assets (Liabilities) at Fair Value [Table Text Block]
   
December 31
,
201
6
    
December
31,
201
5
  
Commodity contracts
   $
623
     $
(400
 )
Foreign currency contracts
    
(150
 )    
(171
 )
Interest rate swaps
    
(1,739
 )    
(2,618
 )