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Note 10 - Notes Payable (Tables)
 12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Debt [Table Text Block]
   
2018
    
2017
  
   
(In thousands)
  
Term Loans
   $
37,996
     $
1,067
  
Less: current portion
    
(3,667
)
    
(1,067
)
Less: unamortized debt issuance costs
    
(153
)
    
--
  
Notes payable, net of current portion
   $
34,176
     $
--
  
Schedule of Maturities of Long-term Debt [Table Text Block]
2019
   $
3,715
  
2020
    
4,418
  
2021
    
4,916
  
2022
    
5,171
  
2023
    
19,776