XML 77 R62.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Income Taxes (Details) $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2022 USD ($)
Income Tax Disclosure [Abstract] |
Loss carryforward, description | The Company has state net operating loss carryforward of $3.1 million, which expires beginning 2031.
Generally limited percentage | 8.00%
Federal income taxes | $ 5.2
Amount of unrecognized deferred tax liability relating to the cumulative bad debt deduction | $ 1.3

X
- Definition Generally limited percentage. + References No definition available. + Details
Name: | kffb_GenerallyLimitedPercentage
Namespace Prefix: | kffb_
Data Type: | dtr:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loss carryforward description. + References No definition available. + Details
Name: | kffb_LossCarryforwardDescription
Namespace Prefix: | kffb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition RetainedEarningsNotRecognizedFederalIncomeTaxes + References No definition available. + Details
Name: | kffb_RetainedEarningsNotRecognizedFederalIncomeTaxes
Namespace Prefix: | kffb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of deferred tax liability not recognized because of the exceptions to comprehensive recognition of deferred taxes related to bad debt reserve for tax purposes of a qualified lender. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 740 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=6479915&loc=d3e66715-112838 + Details
Name: | us-gaap_DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityBadDebtReserveForTaxPurposesOfQualifiedLender
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration