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CAPITAL STOCK - Disclosure of detailed information about change in restricted share units outstanding (Details) - Share
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disclosure of terms and conditions of share-based payment arrangement [abstract]    
Restricted share units, beginning of period 958,500 625,000
Vested (312,500)  
Granted 430,000 333,500
Restricted share units, end of period 1,076,000 958,500