GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) - USD ($)	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 16, 2022
Goodwill and Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 4,237,000	$ 3,956,000
Intangible Assets	$ 2,080,000	2,542,000
Estimated Useful Life	10 years
Impairment of Goodwill		0
Amortization expense	$ 462,000	$ 0
Citizens Bank of Cape Vincent
Goodwill and Finite-Lived Intangible Assets [Line Items]
Goodwill			$ 4,237,000
Intangible Assets			$ 2,500,000
Citizens Bank of Cape Vincent | Core Deposit Intangible
Goodwill and Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life			10 years