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LOANS RECEIVABLE, NET AND RELATED ALLOWANCE FOR LOAN LOSSES (Schedule of ALL by Loan Category) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Allowance for Loan Losses:
Balance - Allowance for loans losses	$ 7,554	$ 6,400
Individually evaluated for impairment	39	221
Collectively evaluated for impairment	7,515	6,179
Balance - Loans receivable	626,323	611,259
Loan balance individually evaluated for impairment	12,512	14,161
Loan balance collectively evaluated for impairment	613,811	597,098
One-to four-family residential [Member]
Allowance for Loan Losses:
Balance - Allowance for loans losses	1,127	1,035
Individually evaluated for impairment
Collectively evaluated for impairment	1,127	1,035
Balance - Loans receivable	208,656	210,360
Loan balance individually evaluated for impairment	2,367	2,601
Loan balance collectively evaluated for impairment	206,289	207,649
Commercial real estate [Member]
Allowance for Loan Losses:
Balance - Allowance for loans losses	3,709	3,232
Individually evaluated for impairment	10	46
Collectively evaluated for impairment	3,699	3,186
Balance - Loans receivable	275,678	248,134
Loan balance individually evaluated for impairment	3,676	4,405
Loan balance collectively evaluated for impairment	272,002	243,729
Construction [Member]
Allowance for Loan Losses:
Balance - Allowance for loans losses	448	672
Individually evaluated for impairment	29	175
Collectively evaluated for impairment	419	497
Balance - Loans receivable	22,495	28,242
Loan balance individually evaluated for impairment	4,580	5,141
Loan balance collectively evaluated for impairment	17,915	23,211
Home equity lines of credit [Member]
Allowance for Loan Losses:
Balance - Allowance for loans losses	257	179
Individually evaluated for impairment
Collectively evaluated for impairment	257	179
Balance - Loans receivable	17,621	19,373
Loan balance individually evaluated for impairment
Loan balance collectively evaluated for impairment	17,621	19,373
Commercial business [Member]
Allowance for Loan Losses:
Balance - Allowance for loans losses	1,752	1,034
Individually evaluated for impairment
Collectively evaluated for impairment	1,752	1,034
Balance - Loans receivable	98,127	100,993
Loan balance individually evaluated for impairment	1,889	2,014
Loan balance collectively evaluated for impairment	96,238	98,979
Other [Member]
Allowance for Loan Losses:
Balance - Allowance for loans losses	1	1
Individually evaluated for impairment
Collectively evaluated for impairment	1	1
Balance - Loans receivable	3,746	4,157
Loan balance individually evaluated for impairment
Loan balance collectively evaluated for impairment	3,746	4,157
Unallocated [Member]
Allowance for Loan Losses:
Balance - Allowance for loans losses	260	247
Individually evaluated for impairment
Collectively evaluated for impairment	260	247
Balance - Loans receivable
Loan balance individually evaluated for impairment
Loan balance collectively evaluated for impairment

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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