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Note 3 - Long-term Borrowings (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Schedule of Long-Term Debt Instruments [Table Text Block]
   

December 31,

 
   

2022

   

2021

 

Notes Payable due July, 2022

  $ -     $ 1,595  

Accrued in-kind interest – long term

    -       450  

Less unamortized discount and debt issuance costs

    -       (22

)

      -       2,023  

Current portion of long-term borrowing

    -       2,023  

Non-current portion of long-term borrowing

  $ -     $ -