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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, 2020 | Sep. 30, 2019
--- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | $ 30,042 | $ 29,481
Gross Unrealized Gains | 819 | 293
Gross Unrealized Losses | (722) | (430)
Fair Value | 30,139 | 29,344
Obligations of U.S. government agencies Mortgage backed securities - residential [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 1,917 | 445
Gross Unrealized Gains | 30 |
Gross Unrealized Losses | (37) | (54)
Fair Value | 1,910 | 391
Obligations of U.S. government agencies Mortgage backed securities -commercial [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 810 | 842
Gross Unrealized Gains |  |
Gross Unrealized Losses | (6) | (6)
Fair Value | 804 | 836
Obligations of U.S. government-sponsored enterprises Mortgage-backed securities-residential [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 23,078 | 22,363
Gross Unrealized Gains | 759 | 276
Gross Unrealized Losses | (9) | (47)
Fair Value | 23,828 | 22,592
Obligations of U.S. government-sponsored enterprises Debt securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 970 | 2,468
Gross Unrealized Gains | 30 | 10
Gross Unrealized Losses |  |
Fair Value | 1,000 | 2,478
Private label mortgage-backed securities-residential [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 267 | 363
Gross Unrealized Gains |  | 7
Gross Unrealized Losses | (34) |
Fair Value | 233 | 370
Corporate securities [Member] |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 3,000 | 3,000
Gross Unrealized Gains |  |
Gross Unrealized Losses | (636) | (323)
Fair Value | $ 2,364 | $ 2,677

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