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Note 6 - Warrants (Tables)
9 Months Ended
Sep. 30, 2025
Notes Tables  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
  

Warrants outstanding

  

Weighted average price per share

  

Weighted average remaining life

  

Aggregate intrinsic value(1)

 

Balance, December 31, 2023

  51,590,300  $0.27         

Granted

  4,127,516  $0.27         

Exercised

  (3,278,337) $0.24         

Expired

  (20,534,700) $0.23         

Vested Balance, September 30, 2024

  31,904,779  $0.29   3.5     
                 

Balance, December 31, 2024

  31,615,616  $0.29         

Expired

  (2,634,698) $0.22         

Vested Balance, September 30, 2025

  28,980,918  $0.29   1.8  $2,000 
Schedule Of Assumptions Used To Determine Fair Value Of Warrants [Table Text Block]
  

2025

  

2024

 

Risk free interest rate

  %  3.69 - 5.38%

Expected volatility

  %  64 - 95%

Expected dividend yield

      

Forfeiture rate

      

Expected life in years

     .5 - 5