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Note 6 - Long-term Debt (Tables)
9 Months Ended
Sep. 30, 2019
Notes Tables  
Schedule of Long-term Debt Instruments [Table Text Block]
   
September 30, 2019
   
December 31, 2018
 
First Lien Credit Facilities:
               
Term loans, interest at LIBOR or base rate plus 3.50% (5.61% at September 30, 2019), net of unamortized discount and deferred loan costs of $9.5 million and $10.9 million at September 30, 2019 and December 31, 2018, respectively.
  $
523,846
    $
526,461
 
Equipment long-term note payable and finance leases
   
1,701
     
1,422
 
Total debt
   
525,547
     
527,883
 
Less: Current portion
   
(6,026
)    
(5,959
)
Long-term debt
  $
519,521
    $
521,924