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Consolidated Statements of Stockholders' Equity (Parentheticals) - $ / shares | 12 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022
Stock options exercised (in shares) | 12,500 | 8,750
Dividends declared per share (in dollars per share) | $ 0.79 | $ 0.78
Common stock issued (in shares) | 182,219 | 1,436,693

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