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Note 12 - Convertible Notes (Tables)
12 Months Ended
Dec. 31, 2023
Notes Tables  
Schedule of Long-Term Debt Instruments [Table Text Block]

Principal amount

 $1,831 

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

  (596)

Unamortized debt issuance costs

  (98)

Total Secured Convertible Notes, net

 $1,137 
Schedule of Maturities of Long-Term Debt [Table Text Block]

2024

 $1,831