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EQUITY - Stock options (Detail) - Stock options
1 Months Ended 9 Months Ended
Aug. 31, 2017
$ / shares
shares
Jul. 31, 2017
employee
shares
Mar. 31, 2018
shares
Mar. 31, 2017
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock option valuation method     Black-Scholes valuation model  
Stock options granted   135,000 179,047 125,080
Number of employees | employee   11    
2018        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting percentage   0.33%    
2019        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting percentage   0.33%    
2020        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting percentage   0.33%    
Chief Executive Officer ("CEO")        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options granted 19,047      
Granted | $ / shares $ 5.25      
Chief Financial Officer ("CFO")        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock options granted 25,000      
Granted | $ / shares $ 5.25      
Chief Financial Officer ("CFO") | 2018        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting percentage 0.33%      
Chief Financial Officer ("CFO") | 2019        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting percentage 0.33%      
Chief Financial Officer ("CFO") | 2020        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting percentage 0.33%