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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended
--- | --- | ---
Nov. 16, 2021 | Sep. 30, 2021 | Sep. 30, 2020
FHLB stock par value |  | $ 100 |
Revenue from contracts with customers included in service charges |  | 1,100 | $ 901
Revenue from contracts with customers included in other operating income |  | 110 | 106
Fees for other customer services |  | 777 |
Subsequent Event [Member] |  |  |
Dividend payable, declaration date | Nov. 16, 2021 |  |
Dividend payable per common share | $ 0.12 |  |
Dividend payable, date to be paid | Dec. 14, 2021 |  |
Dividend payable, record date | Nov. 30, 2021 |  |
Small Business Relief Grant Program [Member] |  |  |
Fees for other customer services |  | $ 777 |

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