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Share-based payments - Share-based compensation expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Share-based payment expense | $ 2,853 | $ 1,609 | $ 5,953 | $ 3,209
2015 Plan |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Share-based payment expense |  |  | 777 | 1,241
2016 Plan |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Share-based payment expense |  |  | 2,253 | 1,968
2017 Plan |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Share-based payment expense |  |  | 2,360 | 0
2018 Plan |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Share-based payment expense |  |  | $ 563 | $ 0

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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 equity-settled share-based payment transactions in which the goods or services received did not qualify for recognition as assets. [Refer: Expense from share-based payment transactions in which 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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- Details
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- Details
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- Details
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