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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, 2019	Sep. 30, 2018
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	$ 512,813	$ 511,323
Total Past Due	7,063	1,175
Non - Accrual	3,779	906
Total loans receivable	519,876	512,498
One-to four-family residential [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	188,055	185,132
Total Past Due	1,011	155
Non - Accrual	38	138
Total loans receivable	189,066	185,287
Commercial real estate [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	220,955	218,892
Total Past Due	2,477	455
Non - Accrual	450	455
Total loans receivable	223,432	219,347
Construction [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	30,593	30,412
Total Past Due	2,900
Non - Accrual	2,900
Total loans receivable	33,493	30,412
Home equity lines of credit [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	19,443	17,892
Total Past Due	39	90
Non - Accrual	39	90
Total loans receivable	19,482	17,982
Commercial business [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	48,589	52,845
Total Past Due	636	475
Non - Accrual	352	223
Total loans receivable	49,225	53,320
Other [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	5,178	6,150
Total Past Due
Non - Accrual
Total loans receivable	5,178	6,150
30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	3,284	269
30-59 Days Past Due [Member] | One-to four-family residential [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	973	17
30-59 Days Past Due [Member] | Commercial real estate [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,027
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
30-59 Days Past Due [Member] | Commercial business [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	284	252
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
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
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
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	3,779	906
90 Days Past Due [Member] | One-to four-family residential [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	38	138
90 Days Past Due [Member] | Commercial real estate [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	450	455
90 Days Past Due [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	2,900
90 Days Past Due [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	39	90
90 Days Past Due [Member] | Commercial business [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	352	223
90 Days Past Due [Member] | Other [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due

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