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WARRANTS AND STOCK OPTIONS - Disclosure of number and weighted average exercise prices of share options (Details) | 1 Months Ended | 12 Months Ended
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Jun. 18, 2019 Share | Apr. 23, 2019 Share | Feb. 21, 2018 Share | Dec. 31, 2019 CAD ($) Share | Dec. 31, 2018 CAD ($) Share
Warrants And Stock Options [Abstract] |  |  |  |  |
Number of share options outstanding in share-based payment arrangement at beginning of period | Share |  |  |  | 5,200,001 | 4,283,335
Weighted average exercise price of share options outstanding in share-based payment arrangement at beginning of period | $ |  |  |  | $ 0.98 | $ 0.76
Number of share options granted in share-based payment arrangement | Share | 1,675,000 | 400,000 | 2,325,000 | 2,075,000 | 2,325,000
Weighted average exercise price of share options granted in share-based payment arrangement | $ |  |  |  | $ 0.87 | $ 1.20
Number of share options exercised in share-based payment arrangement | Share |  |  |  | (125,000) | (1,225,000)
Weighted average exercise price of share options exercised in share-based payment arrangement | $ |  |  |  | $ 0.58 | $ 0.60
Number of share options expired in share-based payment arrangement | Share |  |  |  | (850,000) |
Weighted average exercise price of share options expired in share-based payment arrangement | $ |  |  |  | $ 0.90 |
Number of share options forfeited in share-based payment arrangement | Share |  |  |  | (150,000) | (183,334)
Weighted average exercise price of share options forfeited in share-based payment arrangement | $ |  |  |  | $ 1.20 | $ 1.16
Number of share options outstanding in share-based payment arrangement at end of period | Share |  |  |  | 6,150,001 | 5,200,001
Weighted average exercise price of share options outstanding in share-based payment arrangement at end of period | $ |  |  |  | $ 0.96 | $ 0.98

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