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Note 6 - Stockholders' Equity (Tables)
9 Months Ended
Sep. 30, 2024
Notes Tables  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]

Issue Date

 

Number

of Shares

   

Exercise

Price

 

Expiration

September 2020

    159,781     $ 75.00  

September 2025

September 2021

    6,668       195.00  

September 2026

May 2024

    1,605,688       1.68  

May 2029

July 2024

    2,170,000       2.86  

November 2029

August 2024

    2,675,610       5.00  

August 2029

Outstanding at September 30, 2024

    6,617,747