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STOCK-BASED COMPENSATION - Changes in Non-Vested Options Outstanding (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2018
Number of Options      
Granted (in shares) 47,500 70,000  
Wgtd. Avg. Grant Date Fair Value      
Granted (in dollars per share) $ 2.77 $ 2.40  
Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 186,727 153,186  
Number of Options      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 9.19 $ 7.09  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 50,556 63,011  
Wgtd. Avg. Grant Date Fair Value      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 6.56 $ 5.36  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (17,015) (12,258)  
Vested (in dollars per share) $ 3.58 $ 4.64  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value $ 0 $ 3.58  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period 0 (68,059)  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value $ 86 $ 0  
Non-vested | Restricted Stock Units (RSUs) [Member]      
Wgtd. Avg. Grant Date Fair Value      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options $ 762 $ 659  
Employee Service Share Based Compensation Non Vested Shares Total Compensation Not Yet Recognized Period For Recognition 1 year 9 months 18 days 2 years 2 months 12 days  
Vested | Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number   153,186 170,492
Wgtd. Avg. Grant Date Fair Value      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value   $ 5.36 $ 3.96