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LOANS RECEIVABLE, NET AND RELATED ALLOWANCE FOR LOAN LOSSES (Schedule of Classes of the Loan Portfolio Summarized by Bank's Internal Risk Rating System) (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Sep. 30, 2019
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross | $ 547,404 | $ 523,001
Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross | 537,413 | 514,008
Special Mention [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross | 419 | 1,409
Substandard [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross | 9,572 | 7,584
Doubtful [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross |  |
One-to four-family residential [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross | 204,575 | 190,415
One-to four-family residential [Member] | Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross | 203,308 | 189,938
One-to four-family residential [Member] | Special Mention [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross |  |
One-to four-family residential [Member] | Substandard [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross | 1,267 | 477
One-to four-family residential [Member] | Doubtful [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross |  |
Commercial real estate [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross | 245,860 | 232,544
Commercial real estate [Member] | Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross | 243,683 | 228,156
Commercial real estate [Member] | Special Mention [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross | 406 | 1,409
Commercial real estate [Member] | Substandard [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross | 1,771 | 2,979
Commercial real estate [Member] | Doubtful [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross |  |
Construction [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross | 22,333 | 28,451
Construction [Member] | Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross | 17,035 | 25,551
Construction [Member] | Special Mention [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross |  |
Construction [Member] | Substandard [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross | 5,298 | 2,900
Construction [Member] | Doubtful [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross |  |
Home equity lines of credit [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross | 22,170 | 17,832
Home equity lines of credit [Member] | Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross | 22,170 | 17,832
Home equity lines of credit [Member] | Special Mention [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross |  |
Home equity lines of credit [Member] | Substandard [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross |  |
Home equity lines of credit [Member] | Doubtful [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross |  |
Commercial business [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross | 47,684 | 48,769
Commercial business [Member] | Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross | 46,435 | 47,541
Commercial business [Member] | Special Mention [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross | 13 |
Commercial business [Member] | Substandard [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross | 1,236 | 1,228
Commercial business [Member] | Doubtful [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross |  |
Other [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross | 4,782 | 4,990
Other [Member] | Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross | 4,782 | 4,990
Other [Member] | Special Mention [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross |  |
Other [Member] | Substandard [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross |  |
Other [Member] | Doubtful [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans and Leases Receivable, Gross |  |

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