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Note 10 - Earnings Per Share (Tables) | 9 Months Ended
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Jun. 30, 2025
Notes Tables |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  | Three Months Ended June 30, |  |  | Nine Months Ended June 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Net income |  | $ | 538,412 |  |  | $ | 156,692 |  |  | $ | 13,484,309 |  |  | $ | 11,620,074 |
Weighted-average common shares |  |  | 10,319,232 |  |  |  | 10,188,592 |  |  |  | 10,294,227 |  |  |  | 10,129,111 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options to purchase common stock |  |  | 4,933 |  |  |  | 4,205 |  |  |  | 4,461 |  |  |  | 3,236 |
Diluted average common shares |  |  | 10,324,165 |  |  |  | 10,192,797 |  |  |  | 10,298,688 |  |  |  | 10,132,347 |
Earnings per share of common stock: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 0.05 |  |  | $ | 0.02 |  |  | $ | 1.31 |  |  | $ | 1.15 |
Diluted |  | $ | 0.05 |  |  | $ | 0.02 |  |  | $ | 1.31 |  |  | $ | 1.15 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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