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INVESTMENT SECURITIES (Summary of Maturities of Debt Securities and Mortgage-backed Securities Held to Maturity) (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Sep. 30, 2020
--- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | $ 32,493 | $ 30,443
Gross Unrealized Gains | 632 | 709
Gross Unrealized Losses | (232) | (253)
Fair Value | 32,893 | 30,899
Obligations of U.S. government agencies Mortgage backed securities - residential [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 1,172 | 1,453
Gross Unrealized Gains | 10 | 11
Gross Unrealized Losses | (30) | (33)
Fair Value | 1,152 | 1,431
Obligations of U.S. government agencies Mortgage backed securities -commercial [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 757 | 775
Gross Unrealized Gains |  |
Gross Unrealized Losses |  |
Fair Value | 757 | 775
Obligations of U.S. government-sponsored enterprises Mortgage-backed securities-residential [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 20,809 | 20,456
Gross Unrealized Gains | 621 | 697
Gross Unrealized Losses | (3) | (3)
Fair Value | 21,427 | 21,150
Obligations of U.S. government-sponsored enterprises Debt securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 6,500 | 4,500
Gross Unrealized Gains | 1 | 1
Gross Unrealized Losses | (1) | (16)
Fair Value | 6,500 | 4,485
Private label mortgage-backed securities-residential [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 255 | 259
Gross Unrealized Gains |  |
Gross Unrealized Losses | (2) | (5)
Fair Value | 253 | 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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