INTEREST RATE DERIVATIVES (Details)					3 Months Ended		6 Months Ended
	Dec. 29, 2023 USD ($) item	Feb. 14, 2023 USD ($) item security	Dec. 14, 2022 USD ($) security item	Dec. 09, 2022 USD ($) item	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)
Derivative [Line Items]
Amounts recognized in earnings as noninterest gain (loss)					$ (38,000)	$ (387,000)	$ (181,000)	$ (823,000)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]							Noninterest Expense, Noninterest Income	Noninterest Expense, Noninterest Income
Realized gain on swap unwound						$ 310,000	$ 75,000	$ 654,000
Interest Rate Swap
Derivative [Line Items]
Number of off-balance sheet swaps unwounded | item	2	2		2
Notional Amount	$ 2,500,000	$ 5,000,000.0		$ 6,000,000.0
Realized gain on swap unwound	$ 75,000	$ 310,000		$ 343,000
Number of investments sold | item		10	4
Total value of derivative assets		$ 3,650,000	$ 2,000,000.0
Gain (loss) on investments		318,000	342,000
Amount of derivative assets reinvested		$ 3,090,000.00	$ 2,000,000.0
Number of new securities | security		3	2