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EQUITY - Fair value of options (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Jul. 31, 2017
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2018
Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share-based Compensation   $ 360 $ 107 $ 997 $ 315
Stock options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock options granted 135,000     179,047 125,080
Weighted average exercise price   $ 5.66 $ 4.17 $ 5.66 $ 4.17
Weighted average grant date fair value   $ 2.42 $ 1.68 $ 2.42 $ 1.68
Share-based Compensation   $ 127 $ 61 $ 403 $ 155
Stock options | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Expected volatility (percent)       50.20% 49.00%
Expected life (years)       4 years 3 years
Risk-free interest rate (percent)       1.64% 1.06%
Stock options | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Expected volatility (percent)       50.90% 50.00%
Expected life (years)       4 years 6 months 4 years
Risk-free interest rate (percent)       1.72% 1.90%