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Note 9 - Net Loss Per Share - Components of Reconciliation of Numerators and Denominators Net Loss Per Share (Details) - USD ($)
3 Months Ended 6 Months Ended
Apr. 30, 2025
Jan. 31, 2025
Apr. 30, 2024
Jan. 31, 2024
Apr. 30, 2025
Apr. 30, 2024
Net loss $ (697,922) $ (1,107,431) $ (1,601,346) $ (1,425,274) $ (1,805,353) $ (3,026,620)
Shares (denominator) (in shares) 7,798,366   7,710,801   7,810,179 7,731,605
Net loss per share: Basic and diluted (in dollars per share) $ (0.09)   $ (0.21)   $ (0.23) $ (0.39)