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Commitments and Credit Risk - Additional Information (Detail) - USD ($) | 12 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021
Commitments And Contingencies Disclosure [Line Items] |  |
Outstanding commitments to originate loans amount | $ 28,024,000 | $ 19,137,000
Loan amount commitments at fixed rates of interest | $ 15,704,000 | $ 7,594,000
Weighted average interest rates for fixed rate loan commitments | 4.36% | 3.59%
Commercial [Member] |  |
Commitments And Contingencies Disclosure [Line Items] |  |
Lines of credit to borrowers | $ 116,284,000 | $ 93,339,000
Open End Consumer Lines [Member] |  |
Commitments And Contingencies Disclosure [Line Items] |  |
Lines of credit to borrowers | $ 11,468,000 | $ 10,633,000

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- Definition Reflects the amount of cash required to fully fund agreements to provide advances to borrowers and lessees at stated interest rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 825 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI https://asc.fasb.org/extlink&oid=126941378&loc=d3e61044-112788 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 825 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126941378&loc=d3e61082-112788 + Details
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