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INVESTMENT SECURITIES - Schedule of Amortized Cost and Fair Values of Securities Held to Maturity (Details) - Debt Securities [Member] - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Securities available-for-sale:
Amortized Cost, Securities available-for-sale	$ 21,915	$ 16,747
Gross Unrealized Gains, Securities available-for-sale	357	77
Gross Unrealized Losses, Securities available-for-sale	(1,090)	(1,208)
Allowance for Credit Losses, Securities available-for-sale
Fair Value, Securities available-for-sale	21,182	15,616
Securities held-to-maturity:
Amortized Cost, Securities held-to-maturity	67,266	79,816
Gross Unrealized Gains, Securities held-to-maturity	40	84
Gross Unrealized Losses, Securities held-to-maturity	(6,146)	(7,283)
Allowance for Credit Losses, Securities held-to-maturity
Fair Value, Securities held-to-maturity	61,160	72,617
Amortized Cost, Total investment securities	89,181	96,563
Gross Unrealized Gains, Total investment securities	397	161
Gross Unrealized Losses, Total investment securities	(7,236)	(8,491)
Allowance for Credit Losses, Total investment securities
Fair Value, Total investment securities	82,342	88,233
Residential Mortgage-Backed Securities [Member] | Obligations of U.S. government agencies [Member]
Securities available-for-sale:
Amortized Cost, Securities available-for-sale	90
Gross Unrealized Gains, Securities available-for-sale
Gross Unrealized Losses, Securities available-for-sale	(8)
Allowance for Credit Losses, Securities available-for-sale
Fair Value, Securities available-for-sale	82
Residential Mortgage-Backed Securities [Member] | Obligations of U.S. government-sponsored enterprises [Member]
Securities available-for-sale:
Amortized Cost, Securities available-for-sale	15,325
Gross Unrealized Gains, Securities available-for-sale	70
Gross Unrealized Losses, Securities available-for-sale	(1,082)
Allowance for Credit Losses, Securities available-for-sale
Fair Value, Securities available-for-sale	14,313
Securities held-to-maturity:
Amortized Cost, Securities held-to-maturity	40,741	42,701
Gross Unrealized Gains, Securities held-to-maturity	4	4
Gross Unrealized Losses, Securities held-to-maturity	(4,679)	(5,194)
Allowance for Credit Losses, Securities held-to-maturity
Fair Value, Securities held-to-maturity	36,066	37,511
Corporate securities [Member] | Obligations of U.S. government agencies [Member]
Securities available-for-sale:
Amortized Cost, Securities available-for-sale		4,000
Gross Unrealized Gains, Securities available-for-sale		21
Gross Unrealized Losses, Securities available-for-sale
Allowance for Credit Losses, Securities available-for-sale
Fair Value, Securities available-for-sale		4,021
Corporate securities [Member] | Obligations of U.S. government-sponsored enterprises [Member]
Securities available-for-sale:
Amortized Cost, Securities available-for-sale	6,500
Gross Unrealized Gains, Securities available-for-sale	287
Gross Unrealized Losses, Securities available-for-sale
Allowance for Credit Losses, Securities available-for-sale
Fair Value, Securities available-for-sale	6,787
Securities held-to-maturity:
Amortized Cost, Securities held-to-maturity	3,000	3,000
Gross Unrealized Gains, Securities held-to-maturity
Gross Unrealized Losses, Securities held-to-maturity	(86)	(234)
Allowance for Credit Losses, Securities held-to-maturity
Fair Value, Securities held-to-maturity	2,914	2,766
Mortgage-backed securities - residential [Member] | Obligations of U.S. government agencies [Member]
Securities available-for-sale:
Amortized Cost, Securities available-for-sale		95
Gross Unrealized Gains, Securities available-for-sale
Gross Unrealized Losses, Securities available-for-sale		(6)
Allowance for Credit Losses, Securities available-for-sale
Fair Value, Securities available-for-sale		89
Securities held-to-maturity:
Amortized Cost, Securities held-to-maturity	6,558	7,209
Gross Unrealized Gains, Securities held-to-maturity
Gross Unrealized Losses, Securities held-to-maturity	(629)	(611)
Allowance for Credit Losses, Securities held-to-maturity
Fair Value, Securities held-to-maturity	5,929	6,598
Commercial Mortgage-Backed Securities [Member] | Obligations of U.S. government agencies [Member]
Securities available-for-sale:
Amortized Cost, Securities available-for-sale		12,652
Gross Unrealized Gains, Securities available-for-sale		56
Gross Unrealized Losses, Securities available-for-sale		(1,202)
Allowance for Credit Losses, Securities available-for-sale
Fair Value, Securities available-for-sale		11,506
Securities held-to-maturity:
Amortized Cost, Securities held-to-maturity	3,913	4,268
Gross Unrealized Gains, Securities held-to-maturity	19	64
Gross Unrealized Losses, Securities held-to-maturity	(17)	(23)
Allowance for Credit Losses, Securities held-to-maturity
Fair Value, Securities held-to-maturity	3,915	4,309
Debt Securities [Member] | Obligations of U.S. government-sponsored enterprises [Member]
Securities held-to-maturity:
Amortized Cost, Securities held-to-maturity	9,449	19,000
Gross Unrealized Gains, Securities held-to-maturity	12	13
Gross Unrealized Losses, Securities held-to-maturity	(455)	(865)
Allowance for Credit Losses, Securities held-to-maturity
Fair Value, Securities held-to-maturity	9,006	18,148
Private label mortgage-backed securities residential [Member] | Obligations of U.S. government-sponsored enterprises [Member]
Securities held-to-maturity:
Amortized Cost, Securities held-to-maturity	174	190
Gross Unrealized Gains, Securities held-to-maturity
Gross Unrealized Losses, Securities held-to-maturity	(2)	(5)
Allowance for Credit Losses, Securities held-to-maturity
Fair Value, Securities held-to-maturity	172	185
ObligationsOfStateAndPoliticalSubdivisionsMember | Obligations of U.S. government-sponsored enterprises [Member]
Securities held-to-maturity:
Amortized Cost, Securities held-to-maturity	3,431	3,448
Gross Unrealized Gains, Securities held-to-maturity	5	3
Gross Unrealized Losses, Securities held-to-maturity	(278)	(351)
Allowance for Credit Losses, Securities held-to-maturity
Fair Value, Securities held-to-maturity	$ 3,158	$ 3,100

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