XML 63 R37.htm IDEA: XBRL DOCUMENT v3.20.2

Summary of Significant Accounting Policies (Details) - Schedule of fair value measurements of assets and liabilities measured at fair value on a recurring basis - USD ($)	Jun. 30, 2020	Jun. 30, 2019
Agency Bonds [Member]
Fair Value	$ 503	$ 505
Agency mortgage-backed: residential [Member]
Fair Value	38	43
U.S. Treasury notes [Member]
Fair Value		497
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Agency Bonds [Member]
Fair Value
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Agency mortgage-backed: residential [Member]
Fair Value
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | U.S. Treasury notes [Member]
Fair Value
Significant Other Observable Inputs (Level 2) [Member] | Agency Bonds [Member]
Fair Value	503	505
Significant Other Observable Inputs (Level 2) [Member] | Agency mortgage-backed: residential [Member]
Fair Value	38	43
Significant Other Observable Inputs (Level 2) [Member] | U.S. Treasury notes [Member]
Fair Value		497
Significant Unobservable Inputs (Level 3) [Member] | Agency Bonds [Member]
Fair Value
Significant Unobservable Inputs (Level 3) [Member] | Agency mortgage-backed: residential [Member]
Fair Value
Significant Unobservable Inputs (Level 3) [Member] | U.S. Treasury notes [Member]
Fair Value

X

- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

Name:	us-gaap_AssetsFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=kffb_AgencyBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=kffb_AgencyMortgagebackedResidentialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USTreasurySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: