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Note 11 - Stockholders' Equity and Common Stock Warrants (Tables)
9 Months Ended
Sep. 30, 2024
Notes Tables  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
   

Outstanding

   

Range of exercise

price per share

 

Expiration dates

Historical Diffusion common stock warrants

    57,965    

$26.27

- $375.14  

November 2024 through February 2026

Historical EIP common stock warrants

    43,618     $19.81  

April 2028

Series A common stock warrants

    2,532,285     $39.24  

The earlier of (i) April 1, 2027 and (ii) the date that is 180 days after the date the Exercise Conditions (as defined in the Series A Warrants) have been met

Pre-funded warrants issued in April 2024 Private Placement

    449,023     $0.001  

None

      3,082,891