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Note 15 - Stockholders' Equity - Shares Purchased (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 9 Months Ended | 18 Months Ended
--- | --- | --- | --- | ---
Apr. 30, 2025 | Oct. 31, 2024 | Sep. 30, 2024 | Aug. 31, 2024 | Mar. 31, 2024 | Aug. 31, 2024 | Aug. 31, 2025 | Aug. 31, 2024 | Aug. 31, 2025
Number of shares (in shares) | 3,927 | 35,678 | 506 | 291,141 | 21,905 |  |  |  | 353,157
Cost of shares | $ 54,940 | $ 499,997 | $ 5,695 | $ 2,994,296 | $ 253,003 | $ 2,994,000 | $ 55,000 | $ 3,247,000 | $ 3,807,931
Average cost per share (in dollars per share) | $ 14 | $ 14 | $ 11.3 | $ 10.3 | $ 11.6 |  |  |  | $ 10.8

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