Loans Receivable, Aging Analysis of Past Due Loans (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2023	Jun. 30, 2023
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	$ 511,847	$ 494,830
Recorded Investment > 90 Days and Accruing	68	0
Loan receivables on nonaccrual status	0	0
Interest income recognized on non-accrual loans	0	0
Estimated gross interest income that would have been recorded if non-accrual loans had been accruing interest at their original contracted rates	102	182
Total Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	2,145	2,254
30-59 Days Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	749	330
60-89 Days Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	414	750
90 Days or More [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	982	1,174
Current [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	509,702	492,576
Real Estate Loans [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	454,070	438,012
Real Estate Loans [Member] | One-to-Four-Family Residential [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	186,002	179,579
Recorded Investment > 90 Days and Accruing	0	0
Real Estate Loans [Member] | One-to-Four-Family Residential [Member] | Total Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	1,387	2,101
Real Estate Loans [Member] | One-to-Four-Family Residential [Member] | 30-59 Days Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	216	177
Real Estate Loans [Member] | One-to-Four-Family Residential [Member] | 60-89 Days Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	257	750
Real Estate Loans [Member] | One-to-Four-Family Residential [Member] | 90 Days or More [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	914	1,174
Real Estate Loans [Member] | One-to-Four-Family Residential [Member] | Current [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	184,615	177,478
Real Estate Loans [Member] | Commercial [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	147,971	148,441
Recorded Investment > 90 Days and Accruing	0	0
Real Estate Loans [Member] | Commercial [Member] | Total Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	0	0
Real Estate Loans [Member] | Commercial [Member] | 30-59 Days Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	0	0
Real Estate Loans [Member] | Commercial [Member] | 60-89 Days Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	0	0
Real Estate Loans [Member] | Commercial [Member] | 90 Days or More [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	0	0
Real Estate Loans [Member] | Commercial [Member] | Current [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	147,971	148,441
Real Estate Loans [Member] | Multi-Family Residential [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	28,781	28,849
Recorded Investment > 90 Days and Accruing	0	0
Real Estate Loans [Member] | Multi-Family Residential [Member] | Total Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	0	0
Real Estate Loans [Member] | Multi-Family Residential [Member] | 30-59 Days Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	0	0
Real Estate Loans [Member] | Multi-Family Residential [Member] | 60-89 Days Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	0	0
Real Estate Loans [Member] | Multi-Family Residential [Member] | 90 Days or More [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	0	0
Real Estate Loans [Member] | Multi-Family Residential [Member] | Current [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	28,781	28,849
Real Estate Loans [Member] | Land [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	30,473	26,841
Recorded Investment > 90 Days and Accruing	0	0
Real Estate Loans [Member] | Land [Member] | Total Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	308	36
Real Estate Loans [Member] | Land [Member] | 30-59 Days Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	308	36
Real Estate Loans [Member] | Land [Member] | 60-89 Days Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	0	0
Real Estate Loans [Member] | Land [Member] | 90 Days or More [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	0	0
Real Estate Loans [Member] | Land [Member] | Current [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	30,165	26,805
Real Estate Loans [Member] | Construction [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	33,984	28,035
Recorded Investment > 90 Days and Accruing	0	0
Real Estate Loans [Member] | Construction [Member] | Total Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	0	0
Real Estate Loans [Member] | Construction [Member] | 30-59 Days Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	0	0
Real Estate Loans [Member] | Construction [Member] | 60-89 Days Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	0	0
Real Estate Loans [Member] | Construction [Member] | 90 Days or More [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	0	0
Real Estate Loans [Member] | Construction [Member] | Current [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	33,984	28,035
Real Estate Loans [Member] | Equity and Second Mortgage [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	2,488	2,450
Recorded Investment > 90 Days and Accruing	16	0
Real Estate Loans [Member] | Equity and Second Mortgage [Member] | Total Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	0	54
Real Estate Loans [Member] | Equity and Second Mortgage [Member] | 30-59 Days Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	0	54
Real Estate Loans [Member] | Equity and Second Mortgage [Member] | 60-89 Days Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	0	0
Real Estate Loans [Member] | Equity and Second Mortgage [Member] | 90 Days or More [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	0	0
Real Estate Loans [Member] | Equity and Second Mortgage [Member] | Current [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	2,488	2,396
Real Estate Loans [Member] | Equity Lines of Credit [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	24,371	23,817
Recorded Investment > 90 Days and Accruing	0	0
Real Estate Loans [Member] | Equity Lines of Credit [Member] | Total Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	242	0
Real Estate Loans [Member] | Equity Lines of Credit [Member] | 30-59 Days Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	116	0
Real Estate Loans [Member] | Equity Lines of Credit [Member] | 60-89 Days Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	110	0
Real Estate Loans [Member] | Equity Lines of Credit [Member] | 90 Days or More [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	16	0
Real Estate Loans [Member] | Equity Lines of Credit [Member] | Current [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	24,129	23,817
Commercial Loans [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	56,328	55,364
Recorded Investment > 90 Days and Accruing	47	0
Commercial Loans [Member] | Total Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	198	63
Commercial Loans [Member] | 30-59 Days Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	108	63
Commercial Loans [Member] | 60-89 Days Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	43	0
Commercial Loans [Member] | 90 Days or More [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	47	0
Commercial Loans [Member] | Current [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	56,130	55,301
Consumer Loans [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	1,449	1,454
Recorded Investment > 90 Days and Accruing	5	0
Consumer Loans [Member] | Total Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	10	0
Consumer Loans [Member] | 30-59 Days Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	1	0
Consumer Loans [Member] | 60-89 Days Past Due [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	4	0
Consumer Loans [Member] | 90 Days or More [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	5	0
Consumer Loans [Member] | Current [Member]
Aging analysis of past due loans segregated by class of loans [Abstract]
Total Loans	$ 1,439	$ 1,454