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INVESTMENT SECURITIES (Summary of Maturities of Debt Securities and Mortgage-backed Securities Held to Maturity) (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Sep. 30, 2020
--- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | $ 40,797 | $ 30,443
Gross Unrealized Gains | 459 | 709
Gross Unrealized Losses | (772) | (253)
Fair Value | 40,484 | 30,899
Obligations of U.S. government agencies Mortgage backed securities - residential [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 939 | 1,453
Gross Unrealized Gains |  | 11
Gross Unrealized Losses | (33) | (33)
Fair Value | 906 | 1,431
Obligations of U.S. government agencies Mortgage backed securities -commercial [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 738 | 775
Gross Unrealized Gains |  |
Gross Unrealized Losses |  |
Fair Value | 738 | 775
Obligations of U.S. government-sponsored enterprises Mortgage-backed securities-residential [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 23,371 | 20,456
Gross Unrealized Gains | 455 | 697
Gross Unrealized Losses | (277) | (3)
Fair Value | 23,549 | 21,150
Obligations of U.S. government-sponsored enterprises Debt securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 12,498 | 4,500
Gross Unrealized Gains |  | 1
Gross Unrealized Losses | (266) | (16)
Fair Value | 12,232 | 4,485
Private label mortgage-backed securities-residential [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 251 | 259
Gross Unrealized Gains | 4 |
Gross Unrealized Losses |  | (5)
Fair Value | 255 | 254
Corporate securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 3,000 | 3,000
Gross Unrealized Gains |  |
Gross Unrealized Losses | (196) | (196)
Fair Value | $ 2,804 | $ 2,804

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