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Summary of Significant Accounting Policies (Details) - Schedule of Loans Outstanding - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2024 | Mar. 31, 2023
Schedule of Loans Outstanding [Abstract] |  |
Outstanding principal, beginning of year | $ 480 | $ 688
Changes in composition of related parties | 338 |
Principal disbursed during the year | 194 |
Principal repaid and refinanced during the year | (33) | (208)
Outstanding principal, end of year | $ 979 | $ 480

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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 principal disbursed during the year. + References No definition available. + Details
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- Definition Amount of principal repaid and refinanced during the year. + References No definition available. + Details
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Namespace Prefix: | kffb_
Data Type: | xbrli:monetaryItemType
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- Definition This is the principal amount outstanding for securitized loans only (across all types of loans). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Subparagraph (a) -Paragraph 4 -SubTopic 20 -Topic 860 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481326/860-20-50-4 + Details
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- References No definition available. + Details
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