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Note 8 - Notes Payable (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Debt [Table Text Block]
   
2019
    
2018
  
   
(In thousands)
  
Term Loans
   $
34,281
     $
37,996
  
Less: current portion
    
(4,378
)
    
(3,667
)
Less: unamortized debt issuance costs
    
(108
)
    
(153
)
Notes payable, net of current portion
   $
29,795
     $
34,176
  
Schedule of Maturities of Long-term Debt [Table Text Block]
2020
   $
4,418
  
2021
    
4,916
  
2022
    
5,171
  
2023
    
19,776