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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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