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Note 10 - Earnings Per Share (Details Textual) - shares
3 Months Ended 6 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2025
Mar. 31, 2024
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 2,203 2,712 2,160 3,175