XML 32 R22.htm IDEA: XBRL DOCUMENT
v3.22.1

Earnings Per Share (Details) - Schedule of diluted earnings per share - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2021
Schedule of diluted earnings per share [Abstract] |  |  |  |
Net income allocated to common shareholders, basic and diluted | $ 334 | $ 473 | $ 1,384 | $ 1,128
Weighted average common shares outstanding, basic and diluted | 8,215,825 | 8,211,789 | 8,216,989 | 8,217,654

X
- Definition The Amount of Net income allocated to common shareholders, basic and diluted + References No definition available. + Details
Name: | kffb_NetIncomeAllocatedToCommonShareholdersBasicAndDiluted
Namespace Prefix: | kffb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=126958026&loc=d3e1448-109256 + Details
Name: | us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration