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Note 3 - Summary of Significant Accounting Policies (Tables)
9 Months Ended
Sep. 30, 2024
Notes Tables  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
  

Nine months ended September 30,

 
  

2024

  

2023

 

Stock options

  131,833   254,885 

Restricted stock awards

  33,333   66,667 

Common stock warrants

  5,327,636   3,302,159 

Anson Note

  3,236,280    

Convertible preferred stock

     300,000