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Note 3 - Long Term Borrowings (Tables)
12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Long-term Debt Instruments [Table Text Block]
   
December 31,
 
   
2018
   
 
2017
 
Notes Payable due July, 2022
  $
1,995
    $
1,995
 
Accrued interest – long term
   
148
     
47
 
Less unamortized discount and debt issuance costs
   
(305
)
   
(386
)
     
1,838
     
1,656
 
Current portion of long-term borrowing
   
-
     
-
 
Non-current portion of long-term borrowing
  $
1,838
    $
1,656
 
Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block]
2019
  $
-
 
2020
   
-
 
2021
   
-
 
2022
   
1,995
 
Total
  $
1,995