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Note K - Long-term Debt (Tables)
9 Months Ended
Sep. 30, 2018
Notes Tables  
Schedule of Long-term Debt Instruments [Table Text Block]
   
September 30, 2018
   
December 31, 2017
 
   
(in thousands)
 
Line of credit with a bank (1)
  $
18,122
     
-
 
Equipment Financing (2)
   
187,337
     
172,636
 
Total long-term debt
   
205,459
     
172,636
 
Less current maturities
   
(62,413
)    
(73,641
)
Long-term debt – net of current maturities
  $
143,046
    $
98,995