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Note 8 - Warrants (Tables)
9 Months Ended
Sep. 30, 2025
Notes Tables  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
          

Weighted Average

 
      

Weighted Average

  

Remaining

 
  

Shares

  

Exercise Price

  

Contractual Term

 

Outstanding as of December 31, 2024

  317,664  $4.9600   2.60 

Series F Issued – February 7, 2025

  450,390   0.8294

*

   

Series F Issued – March 17, 2025

  415,420   0.8294

*

   

Series F Issued - May 5, 2025

  602,846   0.8294    

Series F Issued - June 2025

  2,054,262   1.2169

**

   

Series F Issued - July 11, 2025

  671,818   1.1908    

Series F Issued - July 18, 2025

  714,286   1.4000    

Series F Issued - July 21, 2025

  357,143   1.4000    

Series F Issued - July 24, 2025

  456,621   1.8149

***

   

Series F Issued - August 22, 2025

  275,497   1.8149    

Series F Issued - September 19, 2025

  272,599   1.8342    

Series F warrants exchanged for common stock - April

  (125,362)  1.1000    

Series F warrants exchanged for common stock - July

  (142,857)  0.8294    

Exercise of Series F Warrants

  (3,622,918)  1.0400    

Reclassification of Series B Warrants

  7,881,884   0.8294

*

   

Exercise of Series B Warrants

  (7,868,924)  0.8294

*

   

Outstanding as of September 30, 2025

  2,710,369  $1.7296

*

  2.81 

Exercisable as of September 30, 2025

  2,710,369  $1.7296

*

  2.81 
          

Weighted Average

 
      

Weighted Average

  

Remaining

 
  

Shares

  

Exercise Price

  

Contractual Term

 

Outstanding as of December 31, 2024

  4,628,312  $1.9445   4.75 

Issued – March 2025 Down Round Trigger

  2,582,234   1.2036    

Issued – May 2025 Down Round Trigger

  3,057,622   0.8294    

Exercise of Series A Warrants

  (63,017)  1.9445    

Exercise of Series B Warrants

  (2,220,688)  0.9639    

Reclassification of Series B Warrants

  (7,881,884)  0.8294    

Outstanding as of September 30, 2025

  102,579  $1.9445   4.00 

Exercisable as of September 30, 2025

  102,579  $1.9445   4.00