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Note 9 - Derivative Instruments (Tables)
 6 Months Ended
Jun. 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 June 30,
    
For the Six Months
Ended June 30,
  
(in thousands)
  
2019
    
2018
    
2019
    
2018
  
Fixed interest rate hedge
   $
(22
 )   $
-
     $
(31
 )   $
-
  
Interest rate swap (CTI)
    
-
      
-
      
-
      
(5
 )
Metals swaps
    
3
      
101
      
133
      
207
  
Embedded customer derivatives
    
(3
 )    
(101
 )    
(133
 )    
(207
 )
Total loss
   $
(22
 )   $
-
     $
(31
 )   $
(5
 )