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Share capital (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of classes of share capital [abstract] |
Summary of Share Capital |
Voting common shares | Number of Shares |  | Total |
At January 1, 2017 | 143,317,014 |  | $ | 2,819,101 |
Shares issued upon exercise of share options, for cash | 48,529 |  | 586 |
Estimated fair value of share options exercised | — |  | 176 |
Shares issued for acquisition of Integra | 15,436,179 |  | 188,061 |
At December 31, 2017 | 158,801,722 |  | $ | 3,007,924 |
At December 31, 2018 | 158,801,722 |  | $ | 3,007,924 |

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- Definition The disclosure of classes of share capital. [Refer: Share capital [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 79 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_79_a&doctype=Standard -URIDate 2018-03-16 + Details
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