Loans Receivable, Net and Related Allowance for Credit Losses [Abstract]

The following tables present the classes of the loan portfolio by origination year summarized by the aggregate Pass and the criticized categories of Special Mention, Substandard and Doubtful for loans subject to the Company’s internal risk rating system and by performing status for all other loans as of June 30, 2026 and September 30, 2025:

	June 30, 2026												Revolving Loans
	Term Loans Amortized Cost Basis by Origination Fiscal Year												Amortized		Converted
	2026		2025		2024		2023		2022		Prior		Cost Basis		to Term		Total
	(In thousands)
One-to-four family residential
Performing	$	17,272	$	17,949	$	31,246	$	23,494	$	27,802	$	113,949	$	—	$	2,769	$	234,481
Non-performing		—		—		—		213		—		—		—		—		213
Total	$	17,272	$	17,949	$	31,246	$	23,707	$	27,802	$	113,949	$	—	$	2,769	$	234,694
Current period gross charge-offs		—		—		—		—		—		—		—		—		—

Commercial real estate
Pass	$	69,083	$	105,757	$	95,255	$	67,483	$	62,098	$	178,524	$	8,700	$	—	$	586,900
Special Mention		—		—		233		1,052		—		1,535		—		—		2,820
Substandard		—		—		—		—		89		—		—		—		89
Doubtful		—		—		—		—		—		—		—		—		—
Total	$	69,083	$	105,757	$	95,488	$	68,535	$	62,187	$	180,059	$	8,700	$	—	$	589,809
Current period gross charge-offs		—		—		—		—		—		—		—		—		—

Construction and land
Pass	$	9,365	$	1,650	$	—	$	—	$	—	$	1,338	$	400	$	—	$	12,753
Special Mention		—		—		—		—		—		—		—		—		—
Substandard		—		—		—		—		—		820		—		—		820
Doubtful		—		—		—		—		—		—		—		—		—
Total	$	9,365	$	1,650	$	—	$	—	$	—	$	2,158	$	400	$	—	$	13,573
Current period gross charge-offs		—		—		—		—		—		300		—		—		300

Home equity loans and lines of credit
Performing	$	1,240	$	447	$	973	$	678	$	1,327	$	1,156	$	25,203	$	—	$	31,024
Non-performing		—		—		64		82		—		—		—		—		146
Total	$	1,240	$	447	$	1,037	$	760	$	1,327	$	1,156	$	25,203	$	—	$	31,170
Current period gross charge-offs		—		—		—		—		—		—		—		—		—

Commercial business
Pass	$	1,189	$	474	$	875	$	564	$	1,844	$	2,741	$	11,155	$	—	$	18,842
Special Mention		—		—		—		—		—		—		—		—		—
Substandard		—		—		—		—		—		—		—		—		—
Doubtful		—		—		—		—		—		—		—		—		—
Total	$	1,189	$	474	$	875	$	564	$	1,844	$	2,741	$	11,155	$	—	$	18,842
Current period gross charge-offs		—		—		—		—		—		—		—		—		—

Other
Performing	$	322	$	1	$	15	$	—	$	8	$	1,386	$	192	$	—	$	1,924
Non-performing		—		—		—		—		—		—		—		—		—
Total	$	322	$	1	$	15	$	—	$	8	$	1,386	$	192	$	—	$	1,924
Current period gross charge-offs		—		—		—		—		—		—		—		—		—

	September 30, 2025												Revolving Loans
	Term Loans Amortized Cost Basis by Origination Fiscal Year												Amortized		Converted
	2025		2024		2023		2022		2021		Prior		Cost Basis		to Term		Total
	(In thousands)
One-to-four family residential
Performing	$	18,873	$	31,952	$	36,663	$	28,465	$	23,556	$	102,642	$	—	$	—	$	242,151
Non-performing		—		—		213		90		—		—		—		—		303
Total	$	18,873	$	32,165	$	36,663	$	28,555	$	23,556	$	102,642	$	—	$	—	$	242,454
Current period gross charge-offs		—		—		—		—		—		—		—		—		—

Commercial real estate
Pass	$	111,456	$	86,068	$	70,546	$	63,905	$	54,060	$	140,866	$	6,110	$	—	$	533,011
Special Mention		—		—		—		91		—		111		—		—		202
Substandard		—		—		—		—		—		—		—		—		—
Doubtful		—		—		—		—		—		—		—		—		—
Total	$	111,456	$	86,068	$	70,546	$	63,996	$	54,060	$	140,977	$	6,110	$	—	$	533,213
Current period gross charge-offs		—		—		—		—		—		—		—		—		—

Construction and land
Pass	$	10,037	$	12,982	$	3,405	$	—	$	—	$	2,863	$	—	$	—	$	29,287
Special Mention		—		—		—		—		—		—		—		—		—
Substandard		—		—		—		—		—		—		—		—		—
Doubtful		—		—		—		—		—		—		—		—		—
Total	$	10,037	$	12,982	$	3,405	$	—	$	—	$	2,863	$	—	$	—	$	29,287
Current period gross charge-offs		—		—		—		—		—		—		—		—		—

Home equity loans and lines of credit
Performing	$	492	$	1,181	$	1,271	$	1,523	$	265	$	1,090	$	25,808	$	—	$	31,630
Non-performing		—		—		148		—		—		—		—		—		148
Total	$	492	$	1,181	$	1,419	$	1,523	$	265	$	1,090	$	25,808	$	—	$	31,778
Current period gross charge-offs		—		—		—		—		—		—		—		—		—

Commercial business
Pass	$	669	$	1,195	$	465	$	2,001	$	1,061	$	2,270	$	12,240	$	147	$	20,048
Special Mention		—		—		—		—		—		—		—		—		—
Substandard		—		—		—		—		—		—		—		—		—
Doubtful		—		—		—		—		—		—		—		—		—
Total	$	669	$	1,195	$	465	$	2,001	$	1,061	$	2,270	$	12,240	$	147	$	20,048
Current period gross charge-offs		—		—		—		—		—		—		—		—		—

Other
Performing	$	464	$	18	$	—	$	25	$	—	$	1,423	$	189	$	—	$	2,119
Non-performing		—		—		—		—		—		—		—		—		—
Total	$	464	$	18	$	—	$	25	$	—	$	1,423	$	189	$	—	$	2,119
Current period gross charge-offs		—		—		—		—		—		—		—		—		—

Schedule of Individually Evaluated Loans

The following tables provide detail on the Company’s loans individually evaluated by collateral type in the Company’s allowance for credit losses with the associated allowance amount, if applicable, as of June 30, 2026 and September 30, 2025:

	Unpaid
	Principal		Recorded		Allowance for
	Balance		Investment		Credit Losses
	(In thousands)
June 30, 2026
Real Estate Collateral:
One-to-four family residential	$	213	$	213	$	—
Commercial real estate		507		507		—
Construction and land		820		820		232
Home loans and lines of credit		146		146		—
Total	$	1,686	$	1,686	$	232

	Unpaid
	Principal		Recorded		Allowance for
	Balance		Investment		Credit Losses
	(In thousands)
September 30, 2025
Real Estate Collateral:
One-to-four family residential	$	303	$	303	$	—
Home loans and lines of credit		148		148		—
Total	$	451	$	451	$	—