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Note 19 - Financial Instruments (Tables)
 6 Months Ended
Jun. 30, 2017
Notes Tables  
Schedule of Derivative Assets and Liabilities at Fair Value [Table Text Block]
    December 31,
2016		   Quoted Prices in
Active Markets for
Identical Assets
(Level 1)		   Significant
Other
Observable
Inputs
(Level 2)		   Unobservable
Inputs
(Level 3)
Recurring measurements:                                
Forward contracts-liability position   $
(85
 )   $
-
     $
(85
 )   $
-
  
Interest rate swaps-liability position    
(15,314
 )    
-
      
(15,314
 )    
-
  
Total   $
(15,399
 )   $
-
     $
(15,399
 )   $
-
  
    June 30,
2017		   Quoted Prices in
Active Markets for
Identical Assets
(Level 1)		   Significant
Other
Observable
Inputs
(Level 2)		   Unobservable
Inputs
(Level 3)
Recurring measurements:                                
Forward contracts-asset position   $
416
     $
-
     $
416
     $
-
  
Interest rate swaps-liability position    
(7,741
 )    
-
      
(7,741
 )    
-
  
Total   $
(7,325
 )   $
-
     $
(7,325
 )   $
-