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Note 6 - Fair Value of Financial Instruments (Tables)
9 Months Ended
Sep. 30, 2025
Notes Tables  
Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]

Level 3

 

September 30, 2025

  

December 31, 2024

 

Notes Warrants

 $78  $197 

Additional Warrants

  9   27 

Total

 $87  $224 
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
  

Notes

  

Additional

     
  

Warrants

  

Warrants

  

Total

 

Measurement at December 31, 2024

 $197  $27  $224 

Change in fair value

 $(107) $(16) $(123)

Measurement at March 31, 2025

 $90  $11  $101 

Change in fair value

 $17  $3  $20 

Measurement at June 30, 2025

 $107  $14  $121 

Change in fair value

 $(29) $(5) $(34)

Measurement at September 30, 2025

 $78  $9  $87 
  

Notes

  

Additional

     
  

Warrants

  

Warrants

  

Total

 

Measurement at December 31, 2023

 $334  $263  $597 

Change in fair value

 $28  $(214) $(186)

Measurement at March 31, 2024

 $362  $49  $411 

Change in fair value

 $(24) $(18) $(42)

Measurement at June 30, 2024

 $338  $31  $369 

Change in fair value

 $(203) $(17) $(220)

Measurement at September 30, 2024

 $135  $14  $149