Quarterly report pursuant to Section 13 or 15(d)

Note 8 - Stockholders' Equity - Estimate Fair Value of Stock Options (Details)

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Note 8 - Stockholders' Equity - Estimate Fair Value of Stock Options (Details)
9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Volatility, minimum 124.90%  
Volatility, maximum 125.70%  
Risk-free rate 4.10% 0.00%
Expected dividend yield 0.00% 0.00%
Minimum [Member]    
Expected term (in years) (Year) 5 years 9 months 18 days  
Maximum [Member]    
Expected term (in years) (Year) 5 years 10 months 24 days