Loans Receivable - Allowance for Credit Losses and Recorded Investment in Loans (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Jun. 30, 2026
Loans Receivable [Abstract]
Beginning Balances	$ 4,926	$ 4,484	$ 4,484
Charge-Offs	(447)		(256)
Recoveries	148		104
Current Provision	275	43	594
Ending Balances	4,902		4,926
Real Estate Loans [Member] \| 1-4 Family Residential [Member]
Loans Receivable [Abstract]
Beginning Balances	2,349	2,202	2,202
Charge-Offs	0		0
Recoveries	1		6
Current Provision	(544)		141
Ending Balances	1,806		2,349
Real Estate Loans [Member] \| Commercial [Member]
Loans Receivable [Abstract]
Beginning Balances	1,277	1,202	1,202
Charge-Offs	(447)		(205)
Recoveries	140		60
Current Provision	355		220
Ending Balances	1,325		1,277
Real Estate Loans [Member] \| Multi-Family [Member]
Loans Receivable [Abstract]
Beginning Balances	108	113	113
Charge-Offs	0		0
Recoveries	0		0
Current Provision	88		(5)
Ending Balances	196		108
Real Estate Loans [Member] \| Land [Member]
Loans Receivable [Abstract]
Beginning Balances	248	165	165
Charge-Offs	0		(10)
Recoveries	1		2
Current Provision	84		91
Ending Balances	333		248
Real Estate Loans [Member] \| Construction [Member]
Loans Receivable [Abstract]
Beginning Balances	195	74	74
Charge-Offs	0		0
Recoveries	0		0
Current Provision	126		121
Ending Balances	321		195
Real Estate Loans [Member] \| Home Equity Loans And Lines of Credit [Member]
Loans Receivable [Abstract]
Beginning Balances	190	182	182
Charge-Offs	0		0
Recoveries	1		22
Current Provision	111		(14)
Ending Balances	302		190
Commercial Loans [Member]
Loans Receivable [Abstract]
Beginning Balances	541	538	538
Charge-Offs	0		(16)
Recoveries	2		2
Current Provision	32		17
Ending Balances	575		541
Consumer Loans [Member]
Loans Receivable [Abstract]
Beginning Balances	18	$ 8	8
Charge-Offs	0		(25)
Recoveries	3		12
Current Provision	23		23
Ending Balances	$ 44		$ 18

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Amount of increase in allowance for credit loss on financing receivable from recovery.

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Amount of credit loss expense (reversal of expense) for financing receivable.

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