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SHARE CAPITAL - Stock options (Details) Options in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 Options $ / shares | Dec. 31, 2018 Options $ / shares
SHARE CAPITAL |  |
Balance | Options | 8,628 | 13,087
Granted | Options | 2,360 |
Forfeited | Options | (1,417) | (1,925)
Expired | Options | (3,993) | (2,534)
Balance | Options | 5,578 | 8,628
Begining balance | $ / shares | $ 4.39 | $ 5.08
Granted | $ / shares | 1.12 |
Forfeited | $ / shares | 3.58 | 4.13
Expired | $ / shares | 5.01 | 8.22
Ending balance | $ / shares | $ 2.81 | $ 4.39

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