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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 | Dec. 31, 2018 | Sep. 30, 2018
--- | --- | ---
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Current | $ 504,006 | $ 511,323
Total Past Due | 10,432 | 1,175
Non - Accrual | 4,061 | 906
Total loans receivable | 514,438 | 512,498
One-to four-family residential [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Current | 184,741 | 185,132
Total Past Due | 1,587 | 155
Non - Accrual | 176 | 138
Total loans receivable | 186,328 | 185,287
Commercial real estate [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Current | 218,163 | 218,892
Total Past Due | 4,983 | 455
Non - Accrual | 452 | 455
Total loans receivable | 223,146 | 219,347
Construction [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Current | 28,387 | 30,412
Total Past Due | 2,900 |
Non - Accrual | 2,900 |
Total loans receivable | 31,287 | 30,412
Home equity lines of credit [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Current | 18,431 | 17,892
Total Past Due | 87 | 90
Non - Accrual | 58 | 90
Total loans receivable | 18,518 | 17,982
Commercial business [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Current | 48,967 | 52,845
Total Past Due | 875 | 475
Non - Accrual | 475 | 223
Total loans receivable | 49,842 | 53,320
Other [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Current | 5,317 | 6,150
Total Past Due |  |
Non - Accrual |  |
Total loans receivable | 5,317 | 6,150
30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total Past Due | 5,410 | 269
30-59 Days Past Due [Member] | One-to four-family residential [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total Past Due | 1,411 | 17
30-59 Days Past Due [Member] | Commercial real estate [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total Past Due | 3,586 |
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 | 29 |
30-59 Days Past Due [Member] | Commercial business [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total Past Due | 384 | 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 | 961 |
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 | 945 |
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 | 16 |
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 | 4,061 | 906
90 Days Past Due [Member] | One-to four-family residential [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total Past Due | 176 | 138
90 Days Past Due [Member] | Commercial real estate [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total Past Due | 452 | 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 | 58 | 90
90 Days Past Due [Member] | Commercial business [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total Past Due | 475 | 223
90 Days Past Due [Member] | Other [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total Past Due |  |

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