Loans Receivable - Schedule of Principal Balance Outstanding in Past Due Loans (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Jun. 30, 2025
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due	$ 6,479	$ 7,834
Total	332,005	329,418
Pass	325,069	322,660
Special Mention	661	672
Substandard	6,275	6,086
Doubtful
Land [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due	28
Total	1,920	1,508
Pass	1,839	1,480
Special Mention
Substandard	81	28
Doubtful
Farm [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due	519
Total	2,595	3,023
Pass	2,595	3,023
Special Mention
Substandard
Doubtful
Nonresidential real estate [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due	34	1,729
Total	32,744	31,698
Pass	31,593	30,195
Special Mention	573	576
Substandard	578	927
Doubtful
Commercial and industrial [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
Total	790	691
Pass	790	691
Special Mention
Substandard
Doubtful
One- to four-family [Member] \| Residential Real Estate [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due	5,611	5,418
Total	250,748	251,338
Pass	245,537	246,533
Special Mention	88	96
Substandard	5,123	4,709
Doubtful
Multi-family [Member] \| Residential Real Estate [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due	241	246
Total	14,975	15,505
Pass	14,734	15,505
Special Mention
Substandard	241
Doubtful
Construction [Member] \| Residential Real Estate [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due	33	418
Total	10,704	9,314
Pass	10,577	9,023
Special Mention
Substandard	127	291
Doubtful
Loans on deposits [Member] \| Consumer and other [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
Total	594	813
Pass	594	813
Special Mention
Substandard
Doubtful
Home Equity [Member] \| Consumer and other [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
Total	16,270	14,643
Pass	16,270	14,643
Special Mention
Substandard
Doubtful
Automobiles [Member] \| Consumer and other [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
Total	151	134
Pass	151	134
Special Mention
Substandard
Doubtful
Unsecured [Member] \| Consumer and other [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due	13	23
Total	514	751
Pass	389	620
Special Mention
Substandard	125	131
Doubtful
30-59 Days Past Due [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due	3,974	5,585
30-59 Days Past Due [Member] \| Land [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
30-59 Days Past Due [Member] \| Farm [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
30-59 Days Past Due [Member] \| Nonresidential real estate [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due	34	1,704
30-59 Days Past Due [Member] \| Commercial and industrial [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
30-59 Days Past Due [Member] \| One- to four-family [Member] \| Residential Real Estate [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due	3,653	3,731
30-59 Days Past Due [Member] \| Multi-family [Member] \| Residential Real Estate [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due	241
30-59 Days Past Due [Member] \| Construction [Member] \| Residential Real Estate [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due	33	127
30-59 Days Past Due [Member] \| Loans on deposits [Member] \| Consumer and other [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
30-59 Days Past Due [Member] \| Home Equity [Member] \| Consumer and other [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
30-59 Days Past Due [Member] \| Automobiles [Member] \| Consumer and other [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
30-59 Days Past Due [Member] \| Unsecured [Member] \| Consumer and other [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due	13	23
60-89 Days Past Due [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due	1,018	958
60-89 Days Past Due [Member] \| Land [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due	28
60-89 Days Past Due [Member] \| Farm [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due	519
60-89 Days Past Due [Member] \| Nonresidential real estate [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due		25
60-89 Days Past Due [Member] \| Commercial and industrial [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
60-89 Days Past Due [Member] \| One- to four-family [Member] \| Residential Real Estate [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due	471	687
60-89 Days Past Due [Member] \| Multi-family [Member] \| Residential Real Estate [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due		246
60-89 Days Past Due [Member] \| Construction [Member] \| Residential Real Estate [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
60-89 Days Past Due [Member] \| Loans on deposits [Member] \| Consumer and other [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
60-89 Days Past Due [Member] \| Home Equity [Member] \| Consumer and other [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
60-89 Days Past Due [Member] \| Automobiles [Member] \| Consumer and other [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
60-89 Days Past Due [Member] \| Unsecured [Member] \| Consumer and other [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
90 Days or Greater [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due	1,487	1,291
90 Days or Greater [Member] \| Land [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
90 Days or Greater [Member] \| Farm [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
90 Days or Greater [Member] \| Nonresidential real estate [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
90 Days or Greater [Member] \| Commercial and industrial [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
90 Days or Greater [Member] \| One- to four-family [Member] \| Residential Real Estate [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due	1,487	1,000
90 Days or Greater [Member] \| Multi-family [Member] \| Residential Real Estate [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
90 Days or Greater [Member] \| Construction [Member] \| Residential Real Estate [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due		291
90 Days or Greater [Member] \| Loans on deposits [Member] \| Consumer and other [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
90 Days or Greater [Member] \| Home Equity [Member] \| Consumer and other [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
90 Days or Greater [Member] \| Automobiles [Member] \| Consumer and other [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
90 Days or Greater [Member] \| Unsecured [Member] \| Consumer and other [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Total Past Due
Loans Not Past Due [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Loans Not Past Due	325,526	321,584
Loans Not Past Due [Member] \| Land [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Loans Not Past Due	1,892	1,508
Loans Not Past Due [Member] \| Farm [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Loans Not Past Due	2,076	3,023
Loans Not Past Due [Member] \| Nonresidential real estate [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Loans Not Past Due	32,710	29,969
Loans Not Past Due [Member] \| Commercial and industrial [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Loans Not Past Due	790	691
Loans Not Past Due [Member] \| One- to four-family [Member] \| Residential Real Estate [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Loans Not Past Due	245,137	245,920
Loans Not Past Due [Member] \| Multi-family [Member] \| Residential Real Estate [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Loans Not Past Due	14,734	15,259
Loans Not Past Due [Member] \| Construction [Member] \| Residential Real Estate [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Loans Not Past Due	10,671	8,896
Loans Not Past Due [Member] \| Loans on deposits [Member] \| Consumer and other [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Loans Not Past Due	594	813
Loans Not Past Due [Member] \| Home Equity [Member] \| Consumer and other [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Loans Not Past Due	16,270	14,643
Loans Not Past Due [Member] \| Automobiles [Member] \| Consumer and other [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Loans Not Past Due	151	134
Loans Not Past Due [Member] \| Unsecured [Member] \| Consumer and other [Member]
Schedule of Principal Balance Outstanding in Past Due Loans [Line Items]
Loans Not Past Due	$ 501	$ 728

Kentucky First Federal Bancorp 10-Q