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Note 11 - Earnings Per Share and Dividends Per Share (Details Textual) - $ / shares
3 Months Ended 6 Months Ended
Nov. 27, 2024
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2025
Mar. 31, 2024
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share) $ 0.1375        
O 2024 Q3 Dividends [Member]          
Dividends Payable, Date of Record Feb. 24, 2025        
Restricted Stock Units (RSUs) [Member]          
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)   0 176,809 0 222,496