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Disclosures about Fair Value of Assets - Fair Value Measurements of Assets Recognized on Recurring Basis (Detail) - USD ($) $ in Thousands | Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2020
--- | --- | --- | ---
Available-for-sale securities: |  |  |
Available-for-sale securities, Fair Value | $ 220,906 | $ 189,891 |
Mortgage servicing rights | 1,463 | 1,013 | $ 715
US Treasury [Member] |  |  |
Available-for-sale securities: |  |  |
Available-for-sale securities, Fair Value | 3,400 | 996 |
US Government and Federal Agency [Member] |  |  |
Available-for-sale securities: |  |  |
Available-for-sale securities, Fair Value | 9,121 | 8,039 |
Mortgage-backed Securities - GSE Residential [Member] |  |  |
Available-for-sale securities: |  |  |
Available-for-sale securities, Fair Value | 188,185 | 170,415 |
Small Business Administration [Member] |  |  |
Available-for-sale securities: |  |  |
Available-for-sale securities, Fair Value | 16,442 | 9,190 |
State and Political Subdivisions [Member] |  |  |
Available-for-sale securities: |  |  |
Available-for-sale securities, Fair Value | 3,758 | 1,251 |
Significant Other Observable Inputs (Level 2) [Member] |  |  |
Available-for-sale securities: |  |  |
Mortgage servicing rights | 0 | 0 |
Significant Other Observable Inputs (Level 2) [Member] | US Treasury [Member] |  |  |
Available-for-sale securities: |  |  |
Available-for-sale securities, Fair Value | 3,400 | 996 |
Significant Other Observable Inputs (Level 2) [Member] | US Government and Federal Agency [Member] |  |  |
Available-for-sale securities: |  |  |
Available-for-sale securities, Fair Value | 9,121 | 8,039 |
Significant Other Observable Inputs (Level 2) [Member] | Mortgage-backed Securities - GSE Residential [Member] |  |  |
Available-for-sale securities: |  |  |
Available-for-sale securities, Fair Value | 188,185 | 170,415 |
Significant Other Observable Inputs (Level 2) [Member] | Small Business Administration [Member] |  |  |
Available-for-sale securities: |  |  |
Available-for-sale securities, Fair Value | 16,442 | 9,190 |
Significant Other Observable Inputs (Level 2) [Member] | State and Political Subdivisions [Member] |  |  |
Available-for-sale securities: |  |  |
Available-for-sale securities, Fair Value | 1,096 | 1,251 |
Significant Unobservable Inputs (Level 3) [Member] |  |  |
Available-for-sale securities: |  |  |
Mortgage servicing rights | 1,463 | $ 1,013 |
Significant Unobservable Inputs (Level 3) [Member] | State and Political Subdivisions [Member] |  |  |
Available-for-sale securities: |  |  |
Available-for-sale securities, Fair Value | $ 2,662 |  |

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124260329&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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- Definition Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6469459&loc=d3e122492-111745 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=128311188&loc=d3e122625-111746 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 2 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745 + Details
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