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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 | Jun. 30, 2019 | Sep. 30, 2018
--- | --- | ---
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Current | $ 523,987 | $ 511,323
Total Past Due | 6,837 | 1,175
Non - Accrual | 4,110 | 906
Total loans receivable | 530,824 | 512,498
One-to four-family residential [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Current | 191,210 | 185,132
Total Past Due | 38 | 155
Non - Accrual | 38 | 138
Total loans receivable | 191,248 | 185,287
Commercial real estate [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Current | 231,116 | 218,892
Total Past Due | 3,321 | 455
Non - Accrual | 920 | 455
Total loans receivable | 234,437 | 219,347
Construction [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Current | 27,636 | 30,412
Total Past Due | 2,900 |
Non - Accrual | 2,900 |
Total loans receivable | 30,536 | 30,412
Home equity lines of credit [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Current | 18,317 | 17,892
Total Past Due | 29 | 90
Non - Accrual |  | 90
Total loans receivable | 18,346 | 17,982
Commercial business [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Current | 51,079 | 52,845
Total Past Due | 549 | 475
Non - Accrual | 252 | 223
Total loans receivable | 51,628 | 53,320
Other [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Current | 4,629 | 6,150
Total Past Due |  |
Non - Accrual |  |
Total loans receivable | 4,629 | 6,150
30-59 Days Past Due [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total Past Due | 1,979 | 269
30-59 Days Past Due [Member] | One-to four-family residential [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total Past Due |  | 17
30-59 Days Past Due [Member] | Commercial real estate [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total Past Due | 1,682 |
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 | 297 | 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 | 748 |
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 | 719 |
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 | 29 |
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 | 4,110 | 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 | 920 | 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 |  | 90
90 Days Past Due [Member] | Commercial business [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total Past Due | 252 | 223
90 Days Past Due [Member] | Other [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total Past Due |  |

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