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v3.23.3

Summary of Significant Accounting Policies (Details) - Schedule of Loans Outstanding - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022
Schedule of Loans Outstanding [Abstract] |  |
Outstanding principal, beginning of year | $ 688 | $ 1,405
Changes in composition of related parties |  |
Principal disbursed during the year |  |
Principal repaid and refinanced during the year | (208) | (717)
Outstanding principal, end of year | $ 480 | $ 688

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- Definition Amount of changes in composition of related parties. + References No definition available. + Details
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- Definition Amount of outstanding principal amount. + References No definition available. + Details
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- Definition Amount of principal disbursed. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Amount of principal repaid and refinanced. + References No definition available. + Details
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Namespace Prefix: | kffb_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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