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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, 2018	Sep. 30, 2017
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	$ 469,954	$ 470,416
Total Past Due	17,318	3,575
Non - Accrual	1,264	2,358
Total loans receivable	487,272	473,991
One-to four-family residential [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	167,674	176,546
Total Past Due	8,809	1,790
Non - Accrual	1,017	1,663
Total loans receivable	176,483	178,336
Commercial real estate [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	207,762	206,218
Total Past Due	6,525	900
Non - Accrual	85	482
Total loans receivable	214,287	207,118
Construction [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	21,495	22,622
Total Past Due	1,453
Non - Accrual
Total loans receivable	22,948	22,622
Home equity lines of credit [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	18,504	18,344
Total Past Due	58	192
Non - Accrual	39
Total loans receivable	18,562	18,536
Commercial business [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	48,868	40,420
Total Past Due	467	693
Non - Accrual	123	213
Total loans receivable	49,335	41,113
Other [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	5,651	6,266
Total Past Due	6
Non - Accrual
Total loans receivable	5,657	6,266
30-59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	16,022	818
30-59 Days Past Due [Member] | One-to four-family residential [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	7,760
30-59 Days Past Due [Member] | Commercial real estate [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	6,440	418
30-59 Days Past Due [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,453
30-59 Days Past Due [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	19
30-59 Days Past Due [Member] | Commercial business [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	344	400
30-59 Days Past Due [Member] | Other [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	6
60-89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	32	399
60-89 Days Past Due [Member] | One-to four-family residential [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	32	127
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		192
60-89 Days Past Due [Member] | Commercial business [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due		80
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	1,264	2,358
90 Days Past Due [Member] | One-to four-family residential [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	1,017	1,663
90 Days Past Due [Member] | Commercial real estate [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	85	482
90 Days Past Due [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due
90 Days Past Due [Member] | Home equity lines of credit [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	39
90 Days Past Due [Member] | Commercial business [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	123	213
90 Days Past Due [Member] | Other [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due

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