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Note 10 - Convertible Notes (Tables)
6 Months Ended
Jun. 30, 2024
Notes Tables  
Schedule of Long-Term Debt Instruments [Table Text Block]

Principal amount

  $ 762  

Unamortized discount for proceeds allocated to embedded derivative liability and May 2023 Warrants

    (92 )

Unamortized debt issuance costs

    (15 )

Total Secured Convertible Notes, net

  $ 655