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INVESTMENT SECURITIES (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]    
Securities pledged to secure public deposits, fair value $ 18,900 $ 25,000
Sales of securities from the available-for-sale 6,600  
Sales from the held-to-maturity 3,400
Net gain on sales of investment securities $ 117 $ 107