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Other income & finance costs (Tables) | 12 Months Ended
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Dec. 31, 2019
Analysis of income and expense [abstract] |
Other income |
(a) Other income | December 31, 2019 |  |  | December 31, 2018 |
Gain on disposal of assets | $ | 656 |  |  | $ | 130 |
Interest and other income | 3,154 |  |  | 16,151 |
Income from royalty sale | 8,075 |  |  | — |
| $ | 11,885 |  |  | $ | 16,281 |
Finance costs |
(b) Finance costs | December 31, 2019 |  |  | December 31, 2018 |
Asset retirement obligation accretion | $ | 2,532 |  |  | $ | 2,038 |
Interest on the senior secured notes | 18,087 |  |  | — |
Interest on the term loan | 6,611 |  |  | — |
Interest on the 2012 notes | 17,525 |  |  | 36,750 |
Write-off of unamortized transaction costs of 2012 notes and ARCA (note 16(b)) | 3,559 |  |  | — |
Interest expense on lease liabilities | 1,828 |  |  | 407 |
Other interest and financing costs | 3,196 |  |  | 3,192 |
Redemption option derivative gain (note 16(a)) | (4,224 | ) |  | — |
Total finance costs | $ | 49,114 |  |  | $ | 42,387 |
Less: Capitalized interest | 3,848 |  |  | 36,750 |
| $ | 45,266 |  |  | $ | 5,637 |

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- Definition The disclosure of finance cost. [Refer: Finance costs] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_10_e&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The disclosure of other operating income. [Refer: Other operating income (expense)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_10_e&doctype=Standard -URIDate 2018-03-16 + Details
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