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Note 9 - Derivative Instruments (Tables)
 9 Months Ended
Sep. 30, 2019
Notes Tables  
Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block]
   
Net Gain (Loss) Recognized
 
   
For the Three Months Ended
September 30,
    
For the Nine Months Ended
September 30,
  
(in thousands)
  
2019
    
2018
    
2019
    
2018
  
Fixed interest rate hedge
   $
(57
 )   $
-
     $
(88
 )   $
-
  
Interest rate swap (CTI)
    
-
      
-
      
-
      
(5
 )
Metals swaps
    
177
      
(221
 )    
310
      
14
  
Embedded customer derivatives
    
(177
 )    
221
      
(310
 )    
(14
 )
Total loss
   $
(57
 )   $
-
     $
(88
 )   $
(5
 )