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Note 11 - Other Stock Plans (Tables) | 12 Months Ended
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Sep. 30, 2025
Notes Tables |
Share-Based Payment Arrangement, Nonemployee Director Award Plan, Activity [Table Text Block] |
|  | 2025 |  |  | 2024 |
|  | Shares |  |  | Weighted-Average Fair Value on Date of Grant |  |  | Shares |  |  | Weighted-Average Fair Value on Date of Grant |
Beginning of year balance |  |  | 137,764 |  |  | $ | 17.11 |  |  |  | 122,207 |  |  | $ | 16.84 |
Granted |  |  | 15,898 |  |  |  | 20.82 |  |  |  | 15,557 |  |  |  | 19.23 |
End of year balance |  |  | 153,662 |  |  | $ | 17.49 |  |  |  | 137,764 |  |  | $ | 17.11 |
Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] |
|  | 2025 |  |  | 2024 |
|  | Shares |  |  | Weighted-Average Fair Value on Date of Grant |  |  | Shares |  |  | Weighted-Average Fair Value on Date of Grant |
Beginning of year balance |  |  | 31,482 |  |  | $ | 20.09 |  |  |  | 8,966 |  |  | $ | 23.19 |
Granted |  |  | 30,470 |  |  |  | 20.00 |  |  |  | 45,723 |  |  |  | 20.12 |
Vested |  |  | (26,736 | ) |  |  | 20.08 |  |  |  | (23,207 | ) |  |  | 21.35 |
End of year balance |  |  | 35,216 |  |  | $ | 20.02 |  |  |  | 31,482 |  |  | $ | 20.09 |

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock awards granted to nonemployee directors that were outstanding at the beginning and end of the year, and the number of awards that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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