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LOANS RECEIVABLE, NET AND RELATED ALLOWANCE FOR LOAN LOSSES (Narrative) (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Dec. 27, 2020 USD ($) | Mar. 31, 2021 USD ($) | Mar. 31, 2020 USD ($) | Mar. 31, 2021 USD ($) Loans | Mar. 31, 2020 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Average Recorded Investment |  | $ 12,855 | $ 10,276 | $ 13,290 | $ 10,302
Troubled Debt Restructurings Loans |  | $ 218 |  | $ 218 |
Number of loans | Loans |  |  |  | 1 |
Loan received |  |  |  | $ 52,500 |
Paycheck Protection Program Loan [Member] |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Interest rate of loan |  | 1.00% |  | 1.00% |
Number of loans | Loans |  |  |  | 185 |
Loan received |  |  |  | $ 26,900 |
Loan origination fees |  | $ 1,200 |  | $ 1,200 |
Percentage of revenue reduction | 25.00% |  |  |  |
Amount of debt forgiveness | $ 150,000 |  |  |  |
Paycheck Protection Program Loan [Member] | Minimum [Member] |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Expected life of loans |  |  |  | 2 years |
Paycheck Protection Program Loan [Member] | Maximum [Member] |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Expected life of loans |  |  |  | 5 years |
Paycheck Protection Program Loan [Member] | SBA [Member] |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Guarantee percentage |  |  |  | 100.00% |
Number of loans | Loans |  |  |  | 214 |
Loan received |  |  |  | $ 56,000 |
Loan origination fees |  | $ 2,000 |  | 2,000 |
Amount of debt forgiveness |  |  |  | $ 30,300 |

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