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SHARE CAPITAL, OPTION PLANS AND SHARE-BASED PAYMENTS - Summary of Stock Options Outstanding Under Various Stock Option Plans (Details)
12 Months Ended 201 Months Ended
Jan. 24, 2017
Feb. 18, 2014
Oct. 22, 2003
Jun. 30, 2021
$ / shares
shares
Jun. 30, 2021
shares
Jun. 30, 2020
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Options grated to date (in shares)       3,208,209    
Options exercised to date (in shares)       (1,605,134)    
Options outstanding (in shares)       8,113,574 8,113,574 7,429,537
2004 Stock Option Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Stock split ratio 2 2 2      
Options grated to date (in shares)         38,348,857  
Options exercised to date (in shares)         (20,798,129)  
Options cancelled to date (in shares)         (9,437,154)  
Options outstanding (in shares)       8,113,574 8,113,574  
Vesting schedule       25.00%    
Minimum (in dollars per share) | $ / shares       $ 22.68    
Maximum (in dollars per share) | $ / shares       $ 48.74    
2004 Stock Option Plan | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Termination grace periods       90 days    
2004 Stock Option Plan | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Termination grace periods       180 days