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LOANS RECEIVABLE, NET AND RELATED ALLOWANCE FOR LOAN LOSSES (Schedule of Classes of the Loan Portfolio Summarized by Aging Categories) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Sep. 30, 2019
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	$ 530,261	$ 515,546
Total Past Due	17,143	7,455
Non - Accrual	9,119	6,894
Total loans receivable	547,404	523,001
One-to four-family residential [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	200,712	190,301
Total Past Due	3,863	114
Non - Accrual	906	114
Total loans receivable	204,575	190,415
Commercial real estate [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	240,540	229,331
Total Past Due	5,320	3,213
Non - Accrual	1,771	2,652
Total loans receivable	245,860	232,544
Construction [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	17,127	25,551
Total Past Due	5,206	2,900
Non - Accrual	5,206	2,900
Total loans receivable	22,333	28,451
Home equity lines of credit [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	22,072	17,832
Total Past Due	98
Non - Accrual
Total loans receivable	22,170	17,832
Commercial business [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	45,028	47,541
Total Past Due	2,656	1,228
Non - Accrual	1,236	1,228
Total loans receivable	47,684	48,769
Other [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	4,782	4,990
Total Past Due
Non - Accrual
Total loans receivable	4,782	4,990
30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	7,932	503
30-59 Days Past Due [Member] | One-to four-family residential [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,957
30-59 Days Past Due [Member] | Commercial real estate [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	3,549	503
30-59 Days Past Due [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due
30-59 Days Past Due [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	6
30-59 Days Past Due [Member] | Commercial business [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,420
30-59 Days Past Due [Member] | Other [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due
60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	92	58
60-89 Days Past Due [Member] | One-to four-family residential [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due
60-89 Days Past Due [Member] | Commercial real estate [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due		58
60-89 Days Past Due [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due
60-89 Days Past Due [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	92
60-89 Days Past Due [Member] | Commercial business [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due
60-89 Days Past Due [Member] | Other [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due
90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	9,119	6,894
90 Days Past Due [Member] | One-to four-family residential [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	906	114
90 Days Past Due [Member] | Commercial real estate [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,771	2,652
90 Days Past Due [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	5,206	2,900
90 Days Past Due [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due
90 Days Past Due [Member] | Commercial business [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,236	1,228
90 Days Past Due [Member] | Other [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due

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