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SHARE-BASED COMPENSATION - Information Related to Share Options Outstanding (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 shares $ / shares | Dec. 31, 2020 shares $ / shares | Dec. 31, 2019 shares $ / shares
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of share options outstanding in share-based payment arrangement (in shares) | shares | 5,119,591 | 4,700,000 | 7,500,000
Weighted average remaining contractual life | 3 years 6 months |  |
Weighted average exercise price (C$/share) | $ 4.82 | $ 4.91 | $ 5.11
$1.01 - $5.00 |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of share options outstanding in share-based payment arrangement (in shares) | shares | 3,100,000 |  |
Weighted average remaining contractual life | 4 years 1 month 6 days |  |
Weighted average exercise price (C$/share) | $ 4.07 |  |
$5.01 - $10.00 |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Number of share options outstanding in share-based payment arrangement (in shares) | shares | 2,000,000.0 |  |
Weighted average remaining contractual life | 2 years 7 months 6 days |  |
Weighted average exercise price (C$/share) | $ 5.97 |  |
Bottom of range | $1.01 - $5.00 |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Exercise price of outstanding share options (C$/share) | 1.01 |  |
Bottom of range | $5.01 - $10.00 |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Exercise price of outstanding share options (C$/share) | 5.01 |  |
Top of range | $1.01 - $5.00 |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Exercise price of outstanding share options (C$/share) | 5.00 |  |
Top of range | $5.01 - $10.00 |  |  |
Disclosure of range of exercise prices of outstanding share options [line items] |  |  |
Exercise price of outstanding share options (C$/share) | $ 10.00 |  |

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