INVESTMENT SECURITIES - Schedule of Maturities Debt Securities and Mortgage Backed Securities Held-to-Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Sep. 30, 2025
Schedule of Maturities Debt Securities and Mortgage Backed Securities Held to Maturity [Line Items]
Amortized Cost, Due within 1 year	$ 1,500
Fair Value, Due within 1 year	1,486
Amortized Cost, Due after 1 but within 5 years	13,271
Fair Value, Due after 1 but within 5 years	12,698
Amortized Cost, Due after 5 but within 10 years	1,110
Fair Value, Due after 5 but within 10 years	963
Amortized Cost, Due after 10 years
Fair Value, Due after 10 years
Amortized Cost, Total debt securities	15,881
Fair Value, Total debt securities	15,147
Mortgage backed securities:
Fair Value, Mortgage backed securities	62,170	$ 61,160
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, without Single Maturity Date	52,224
Debt Securities, Held-to-Maturity, Maturity, without Single Maturity Date, Fair Value	47,023
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Current, Total	68,105
Residential [Member]
Mortgage backed securities:
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, without Single Maturity Date	48,575
Debt Securities, Held-to-Maturity, Maturity, without Single Maturity Date, Fair Value	43,348
Commercial [Member]
Mortgage backed securities:
Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity, without Single Maturity Date	3,649
Debt Securities, Held-to-Maturity, Maturity, without Single Maturity Date, Fair Value	$ 3,675

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