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CAPITAL STOCK - Disclosure of detailed information about options, valuation assumptions (Details) - Year
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disclosure of terms and conditions of share-based payment arrangement [abstract]    
Risk free interest rate 0.42% 1.34%
Expected life (years) 5 5
Expected volatility 61.70% 67.60%
Dividend yield 0.00% 0.00%