XML 50 R35.htm IDEA: XBRL DOCUMENT v3.19.3

Summary of Significant Accounting Policies (Details 2) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Agency Bonds [Member]
Fair value	$ 505
Residential Mortgage Backed Securities [Member]
Fair value	43	$ 48
Quotes Prices in Active Markets for Identical Assets (Level 1) [Member] | Agency Bonds [Member]
Fair value
Quotes Prices in Active Markets for Identical Assets (Level 1) [Member] | Residential Mortgage Backed Securities [Member]
Fair value
Quotes Prices in Active Markets for Identical Assets (Level 1) [Member] | Quotes Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value
Significant Other Observable Inputs (Level 2) [Member] | Agency Bonds [Member]
Fair value	505
Significant Other Observable Inputs (Level 2) [Member] | Residential Mortgage Backed Securities [Member]
Fair value	43	48
Significant Unobservable Inputs (Level 3) [Member] | Agency Bonds [Member]
Fair value
Significant Unobservable Inputs (Level 3) [Member] | Residential Mortgage Backed Securities [Member]
Fair value
US Treasury Notes [Member]
Fair value	497
US Treasury Notes [Member] | Quotes Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair value
US Treasury Notes [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair value	497
US Treasury Notes [Member] | Significant Unobservable Inputs (Level 3) [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=us-gaap_ResidentialMortgageBackedSecuritiesMember
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_FinancialInstrumentAxis=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:

X

- Details

Name:	us-gaap_InvestmentTypeAxis=us-gaap_USTreasuryNotesSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: