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

June 30,

 
   

2024

   

2023

 

Convertible preferred stock

          3,331,201  

Common stock warrants

    2,633,868       43,621  

Stock options

    533,304       114,525  
      3,167,172       3,489,347