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Note 9 - Related Party Notes Payable (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Related Party Transactions [Table Text Block]
(in thousands)
  
 
 
 
Principal amount
   $
1,000
  
Unamortized debt issuance costs
    
(2
 )
Accrued interest
    
204
  
Total debt
    
1,202
  
Less: short-term
    
1,202
  
Long-term
   $
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