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STOCK-BASED COMPENSATION AND STOCK REPURCHASE PROGRAM (Narrative) (Details) - USD ($) | 6 Months Ended | 125 Months Ended |
--- | --- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2018 | Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Treasury stock, shares | 102,996 |  | 102,996 | 102,996
Cost of shares repurchased by ESOP trust | $ 2,300,000 |  |  |
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 will make 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 every January 1 st to the then published Prime Rate (4.50% at January 1, 2018) 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 | 4.50% |  | 4.50% |
Shares allocated | 165,771 |  | 165,771 |
Suspense shares | 52,092 |  | 52,092 |
Fair value of unallocated shares | $ 664,173 |  | $ 664,173 |
ESOP compensation expense | $ 78,000 | $ 75,000 |  |
Total ESOP shares | 217,863 |  | 217,863 |
Second Repurchase Program [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
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) |  |  | 81,000 |
Remaining shares available to be repurchased | 48,924 |  | 48,924 |
Common stock average cost (in dollars per share) |  |  | $ 8.33 |
Stock Option [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period | 5 years |  |  |
Expiration period | 10 years |  |  |

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