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Shareholders' equity - Stock-based payments - Assumptions & Options (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Stock-based payments |  |
Capitalized to royalty, stream and working interest, net | $ 0.3 | $ 0.1
Stock options |  |
Stock-based payments |  |
Expenses related to stock options | $ 1.2 | $ 1.6

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- Definition The amount of expense arising from share-based payment transactions in which the goods or services received are capitalized to royalty, stream and working interest, net. + References No definition available. + Details
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Period Type: | instant

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of expense arising from share-based payment transactions in which the goods or services received did not qualify for recognition as assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 51 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_51_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Details
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