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Equity - Share-based compensation (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Share-based compensation | $ 2,902 | $ 3,125
Share-based compensation | 3,282 | 2,745
Option Expense |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Share-based compensation | 1,676 | 1,245
DSU Expense for 2018 |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Share-based compensation | 307 | 679
Share-based compensation |  | (380)
DSU Expense Adjustment for 2017 |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Share-based compensation | (45) | 0
Share-based compensation | 380 |
RSU Expense |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Share-based compensation | $ 964 | $ 1,201

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- Definition The amount of expense from share-based payment transactions with employees. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The increase (decrease) in equity resulting from share-based payment transactions. [Refer: Equity] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 106 -Subparagraph d -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_106_d_iii&doctype=Standard -URIDate 2017-03-09 + Details
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