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STOCK-BASED COMPENSATION AND STOCK REPURCHASE PROGRAM (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended 155 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Stock option expenses $ 0 $ 0  
Stock award expenses 0 0  
Cost of shares repurchased by ESOP trust $ 2,300    
Average cost of shares repurchased (per share) $ 10.58    
Description of loan with respect to employee stock ownership plan The ESOP trust purchased 217,863 shares of common stock in the open market using proceeds of a loan from the Company. The total cost of shares purchased by the ESOP trust was $2.3 million, reflecting an average cost per share of $10.58. The Bank makes cash contributions to the ESOP on an annual basis sufficient to enable the ESOP to make the required loan payments to the Company. The loan bears a variable interest rate that adjusts annually to Prime Rate (4.75% at January 1, 2020) with principal and interest payable annually in equal installments over thirty years. The loan is secured by shares of the Company's stock.    
Interest rate of loan with respect to employee stock ownership plan 4.75%   4.75%
Fair value of unreleased shares $ 123   $ 123
ESOP compensation expense $ 126 $ 149  
Total ESOP shares 217,863   217,863
Treasury stock, shares 112,996 102,996 112,996
Second Repurchase Program [Member]      
Maximum stock repurchase authorization (as a percent)     5.00%
Stock authorized to be repurchased (in shares) 129,924   129,924
Stock repurchased during period (in shares) 10,000   91,000
Remaining shares available to be repurchased 38,924   38,924
Common stock average cost (in dollars per share) $ 9.03   $ 8.41
Stock Option [Member]      
Vesting period 5 years    
Expiration period 10 years