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Note 8 - Long-term Obligations (Tables)
 3 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Debt [Table Text Block]
   
2020
   
2019
 
2019 senior secured credit facility due 2024
   $
174,521
     $
177,750
  
Debt discount
    
(2,033
 )    
(2,234
 )
Debt issuance costs
    
(1,713
 )    
(1,863
 )
Finance leases and other long-term obligations
    
2,717
      
2,729
  
Total long-term obligations
    
173,492
      
176,382
  
Less current portion
    
(7,931
 )    
(8,906
 )
Long-term obligations, net of current portion
   $
165,561
     $
167,476
  
Schedule of Maturities of Long-term Debt [Table Text Block]
2020 (April 1 - December 31)
   $
5,666
  
2021 (January 1 - December 31)
    
9,067
  
2022 (January 1 - December 31)
    
11,333
  
2023 (January 1 - December 31)
    
15,851
  
2024 (January 1 - December 31)
    
133,018
  
Thereafter
    
2,303
  
Total maturities of long-term obligations
   $
177,238