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Note 7 - Interest Expense, Net
 6 Months Ended
Jun. 30, 2018
Notes to Financial Statements  
Interest Expense Disclosure [Text Block]
NOTE 
7
 — INTEREST EXPENSE, NET
 
The components of interest expense are as follows:
 
   
Three Months Ended June 30,
    
Six Months Ended June 30,
  
   
2018
   
2017
   
2018
   
2017
 
                                 
Interest related to sale of tax benefits
   $
1,761
     $
1,849
     $
3,170
     $
3,861
  
Interest expense
    
15,421
      
14,146
      
28,727
      
28,321
  
Less — amount capitalized
    
(1,336
 )    
(1,455
 )    
(1,707
 )    
(2,719
 )
    $
15,846
     $
14,540
     $
30,190
     $
29,463