Quarterly report [Sections 13 or 15(d)]

Note 10 - Share-based Compensation of Assumptions (Details)

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Note 10 - Share-based Compensation of Assumptions (Details) - $ / shares
3 Months Ended 6 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2025
Mar. 31, 2024
Expected volatility 115.50% 109.10% 110.20% 105.60%
Expected dividend yield 0.00% 0.00% 0.00% 0.00%
Risk-free interest rate 4.10% 4.20% 3.60% 4.60%
Expected term (in years) (Year) 6 years 5 years 7 months 6 days 6 years 5 years 10 months 24 days
Fair value of options granted (in dollars per share) $ 0.39 $ 0.44 $ 0.63 $ 0.55