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STOCK BASED COMPENSATION PLANS - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted average grant date fair value (in USD per share) $ 4.15 $ 2.42 $ 1.80
Fair value of stock options vested $ 187 $ 380 $ 263
Stock grants | Share-based Payment Arrangement, Tranche One      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting percentage 33.33%    
Stock grants | Share-based Payment Arrangement, Tranche Two      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting percentage 33.33%    
Stock grants | Share-based Payment Arrangement, Tranche Three      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting percentage 33.33%