SHARE CAPITAL - Disclosure of range of exercise prices of outstanding share options (Details)
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12 Months Ended |
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Dec. 31, 2021
shares
$ / shares
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Dec. 31, 2020
shares
$ / shares
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Dec. 31, 2019
shares
$ / shares
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| Disclosure of classes of share capital [line items] |
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| Number of share options outstanding in share-based payment arrangement | shares |
3,848,200
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5,978,300
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6,923,000
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| Weighted average remaining contractual life of outstanding share options |
2 years 8 months 12 days
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| Weighted average exercise price of share options outstanding in share-based payment arrangement |
$ 3.68
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$ 3.29
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$ 3.74
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| Number of share options exercisable in share-based payment arrangement | shares |
2,973,100
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4,174,700
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| Weighted average exercise price of share options exercisable in share-based payment arrangement |
$ 3.40
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$ 3.67
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| Options exercise price range 1 [Member] |
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| Disclosure of classes of share capital [line items] |
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| Number of share options outstanding in share-based payment arrangement | shares |
1,556,400
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| Weighted average remaining contractual life of outstanding share options |
3 years 2 months 12 days
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| Weighted average exercise price of share options outstanding in share-based payment arrangement |
$ 2.14
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| Number of share options exercisable in share-based payment arrangement | shares |
1,150,600
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| Weighted average exercise price of share options exercisable in share-based payment arrangement |
$ 2.15
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| Options exercise price range 1 [Member] | Maximum [Member] |
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| Disclosure of classes of share capital [line items] |
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| Exercise price of outstanding share options |
2.99
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| Options exercise price range 1 [Member] | Minimum [Member] |
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| Disclosure of classes of share capital [line items] |
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| Exercise price of outstanding share options |
$ 2.00
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| Options exercise price range 2 [Member] |
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| Disclosure of classes of share capital [line items] |
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| Number of share options outstanding in share-based payment arrangement | shares |
1,150,300
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| Weighted average remaining contractual life of outstanding share options |
1 year 10 months 24 days
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| Weighted average exercise price of share options outstanding in share-based payment arrangement |
$ 3.44
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| Number of share options exercisable in share-based payment arrangement | shares |
1,146,300
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| Weighted average exercise price of share options exercisable in share-based payment arrangement |
$ 3.44
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| Options exercise price range 2 [Member] | Maximum [Member] |
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| Disclosure of classes of share capital [line items] |
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| Exercise price of outstanding share options |
3.99
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| Options exercise price range 2 [Member] | Minimum [Member] |
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| Disclosure of classes of share capital [line items] |
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| Exercise price of outstanding share options |
$ 3.00
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| Options Exercise Price Range 3 [Member] |
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| Disclosure of classes of share capital [line items] |
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| Number of share options outstanding in share-based payment arrangement | shares |
361,000
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| Weighted average remaining contractual life of outstanding share options |
3 months 18 days
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| Weighted average exercise price of share options outstanding in share-based payment arrangement |
$ 4.32
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| Number of share options exercisable in share-based payment arrangement | shares |
361,000
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| Weighted average exercise price of share options exercisable in share-based payment arrangement |
$ 4.32
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| Options Exercise Price Range 3 [Member] | Maximum [Member] |
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| Disclosure of classes of share capital [line items] |
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| Exercise price of outstanding share options |
4.99
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| Options Exercise Price Range 3 [Member] | Minimum [Member] |
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| Disclosure of classes of share capital [line items] |
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| Exercise price of outstanding share options |
$ 4.00
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| Options Exercise Price Range 4 [Member] |
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| Disclosure of classes of share capital [line items] |
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| Number of share options outstanding in share-based payment arrangement | shares |
60,000
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| Weighted average remaining contractual life of outstanding share options |
3 years 8 months 12 days
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| Weighted average exercise price of share options outstanding in share-based payment arrangement |
$ 5.60
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| Number of share options exercisable in share-based payment arrangement | shares |
36,000
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| Weighted average exercise price of share options exercisable in share-based payment arrangement |
$ 5.60
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| Options Exercise Price Range 4 [Member] | Maximum [Member] |
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| Disclosure of classes of share capital [line items] |
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| Exercise price of outstanding share options |
5.99
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| Options Exercise Price Range 4 [Member] | Minimum [Member] |
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| Disclosure of classes of share capital [line items] |
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| Exercise price of outstanding share options |
$ 5.00
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| Options Exercise Price Range 5 [Member] |
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| Disclosure of classes of share capital [line items] |
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| Number of share options outstanding in share-based payment arrangement | shares |
720,500
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| Weighted average remaining contractual life of outstanding share options |
4 years 2 months 12 days
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| Weighted average exercise price of share options outstanding in share-based payment arrangement |
$ 6.90
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| Number of share options exercisable in share-based payment arrangement | shares |
279,200
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| Weighted average exercise price of share options exercisable in share-based payment arrangement |
$ 6.90
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| Options Exercise Price Range 5 [Member] | Maximum [Member] |
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| Disclosure of classes of share capital [line items] |
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| Exercise price of outstanding share options |
6.99
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| Options Exercise Price Range 5 [Member] | Minimum [Member] |
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| Disclosure of classes of share capital [line items] |
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| Exercise price of outstanding share options |
$ 6.00
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