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Note 8 - Debt (Tables)
12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Debt [Table Text Block]
   
As of December 31,
 
(in thousands)
 
2018
   
2017
 
Asset-based revolving credit facility due December 8, 2022
  $
302,530
    $
196,235
 
Industrial revenue bond due April 1, 2018
   
-
     
930
 
Total debt
   
302,530
     
197,165
 
Less current amount
   
-
     
(930
)
Total long-term debt
  $
302,530
    $
196,235
 
Schedule of Maturities of Long-term Debt [Table Text Block]
(in thousands)
 
2019
   
2020
   
2021
   
2022
   
2023
   
Total
   
Total
 
ABL Credit Facility
 
$
-
   
$
-
    $
-
    $
302,530
    $
-
    $
302,530
    $
605,060
 
Total principal payments
  $
-
    $
-
    $
-
    $
302,530
    $
-
    $
302,530
    $
605,060