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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, 2021 | Sep. 30, 2020
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Current | $ 615,687 | $ 600,512
Total Past Due | 10,636 | 10,747
Non - Accrual | 9,551 | 9,732
Total loans receivable | 626,323 | 611,259
One-to four-family residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current | 207,199 | 209,455
Total Past Due | 1,457 | 905
Non - Accrual | 911 | 905
Total loans receivable | 208,656 | 210,360
Commercial real estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current | 272,591 | 245,029
Total Past Due | 3,087 | 3,105
Non - Accrual | 2,548 | 2,219
Total loans receivable | 275,678 | 248,134
Construction [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current | 17,915 | 23,101
Total Past Due | 4,580 | 5,141
Non - Accrual | 4,580 | 5,141
Total loans receivable | 22,495 | 28,242
Home equity lines of credit [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current | 17,621 | 19,373
Total Past Due |  |
Non - Accrual |  |
Total loans receivable | 17,621 | 19,373
Commercial business [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current | 96,615 | 99,397
Total Past Due | 1,512 | 1,596
Non - Accrual | 1,512 | 1,467
Total loans receivable | 98,127 | 100,993
Other [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Current | 3,746 | 4,157
Total Past Due |  |
Non - Accrual |  |
Total loans receivable | 3,746 | 4,157
30-59 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 546 |
30-59 Days Past Due [Member] | One-to four-family residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 546 |
30-59 Days Past Due [Member] | Commercial real estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due |  |
30-59 Days Past Due [Member] | Construction [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due |  |
30-59 Days Past Due [Member] | Home equity lines of credit [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due |  |
30-59 Days Past Due [Member] | Commercial business [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due |  |
30-59 Days Past Due [Member] | Other [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due |  |
60-89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 539 | 1,015
60-89 Days Past Due [Member] | One-to four-family residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due |  |
60-89 Days Past Due [Member] | Commercial real estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 539 | 886
60-89 Days Past Due [Member] | Construction [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due |  |
60-89 Days Past Due [Member] | Home equity lines of credit [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due |  |
60-89 Days Past Due [Member] | Commercial business [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due |  | 129
60-89 Days Past Due [Member] | Other [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due |  |
90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 9,551 | 9,732
90 Days Past Due [Member] | One-to four-family residential [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 911 | 905
90 Days Past Due [Member] | Commercial real estate [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 2,548 | 2,219
90 Days Past Due [Member] | Construction [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 4,580 | 5,141
90 Days Past Due [Member] | Home equity lines of credit [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due |  |
90 Days Past Due [Member] | Commercial business [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 1,512 | 1,467
90 Days Past Due [Member] | Other [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due |  |

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