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Disclosures About Fair Value of Assets - Fair Value Measurements of Assets Recognized on Recurring Basis (Detail) - USD ($) $ in Thousands | Sep. 30, 2024 | Jun. 30, 2024
--- | --- | ---
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | $ 192,651 | $ 190,475
Mortgage servicing rights | 1,366 | 1,491
U.S. Treasury [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value |  | 444
U.S. Government and federal agency and Government sponsored enterprises (GSE's) [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 5,763 | 6,609
Mortgage-backed: GSE residential [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 169,638 | 166,236
Small Business Administration [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 14,152 | 14,086
State and political subdivisions [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 3,098 | 3,100
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. Treasury [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value |  | 444
Significant Other Observable Inputs (Level 2) [Member] |  |
Available-for-sale securities: |  |
Mortgage servicing rights | 0 | 0
Significant Other Observable Inputs (Level 2) [Member] | U.S. Treasury [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value |  | 0
Significant Other Observable Inputs (Level 2) [Member] | U.S. Government and federal agency and Government sponsored enterprises (GSE's) [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 5,763 | 6,609
Significant Other Observable Inputs (Level 2) [Member] | Mortgage-backed: GSE residential [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 169,638 | 166,236
Significant Other Observable Inputs (Level 2) [Member] | Small Business Administration [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 14,152 | 14,086
Significant Other Observable Inputs (Level 2) [Member] | State and political subdivisions [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | 1,041 | 1,043
Significant Unobservable Inputs (Level 3) [Member] |  |
Available-for-sale securities: |  |
Mortgage servicing rights | 1,366 | 1,491
Significant Unobservable Inputs (Level 3) [Member] | State and political subdivisions [Member] |  |
Available-for-sale securities: |  |
Available-for-sale securities, Fair Value | $ 2,057 | $ 2,057

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