LOANS, Activity in Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Allowance for loan losses by portfolio segment [Roll Forward]
Beginning Balance	$ 8,552	$ 7,869
Charge-offs	(66)	0
Recoveries	0	10
Provision (credit) for loan losses	900	100
Ending Balance	9,386	7,979
Residential Real Estate Loans [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Beginning Balance	4,155	5,103
Charge-offs	0	0
Recoveries	0	0
Provision (credit) for loan losses	(40)	(9)
Ending Balance	4,115	5,094
Multi-family Loans [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Beginning Balance	2,433	1,506
Charge-offs	(66)	0
Recoveries	0	0
Provision (credit) for loan losses	201	113
Ending Balance	2,568	1,619
Commercial Real Estate [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Beginning Balance	1,884	1,221
Charge-offs	0	0
Recoveries	0	0
Provision (credit) for loan losses	634	0
Ending Balance	2,518	1,221
Commercial and Industrial [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Beginning Balance	79	38
Charge-offs	0	0
Recoveries	0	10
Provision (credit) for loan losses	105	(4)
Ending Balance	184	44
Construction and Land Development Loans [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Beginning Balance	0	0
Charge-offs	0	0
Recoveries	0	0
Provision (credit) for loan losses	0	0
Ending Balance	0	0
Consumer Loans [Member]
Allowance for loan losses by portfolio segment [Roll Forward]
Beginning Balance	1	1
Charge-offs	0	0
Recoveries	0	0
Provision (credit) for loan losses	0	0
Ending Balance	$ 1	$ 1

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 writeoff of financing receivable, charged against allowance for credit loss.

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

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