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STOCK-BASED COMPENSATION - Stock option activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
STOCK-BASED COMPENSATION    
Options (shares) Granted 503,000 198,000
Employee Stock Option [Member]    
STOCK-BASED COMPENSATION    
Options (shares) Outstanding   301
Options (shares) Exercised (15)  
Options (shares) Granted 503  
Options (shares) Forfeited (13)  
Options (shares) Outstanding 776  
Options (shares) Exercisable 168  
Weighted-Average Exercise Price Outstanding   $ 1.73
Weighted-Average Exercise Price Exercised $ 1.19  
Weighted-Average Exercise Price Granted 1.52  
Weighted-Average Exercise Price Forfeited 1.65  
Weighted-Average Exercise Price Outstanding 1.61  
Weighted-Average Exercise Price Exercisable 1.64  
Weighted-Average Grant Date Fair Value Exercised 0.99  
Weighted-Average Grant Date Fair Value Granted 1.11  
Weighted-Average Grant Date Fair Value Outstanding 1.22  
Weighted-Average Grant Date Fair Value Exercisable $ 1.33  
Weighted-Average Remaining Contractual Life Exercisable 5 years 2 months 23 days  
Aggregate Intrinsic Value Outstanding $ 1,536  
Aggregate Intrinsic Value Exercisable $ 327  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term 7 years 11 months 23 days