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Executive compensation plan (Details Textual) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of Executive compensation plan [Line Items] |  |  |
Key management personnel compensation |  | $ 3,231,000 | $ 2,292,000
Series b shares [Member] | Subsequent Event [Member] | Top of range [member] |  |  |
Disclosure of Executive compensation plan [Line Items] |  |  |
Weighted average share price | $ 54 |  |
Executive compensation plan [Member] |  |  |
Disclosure of Executive compensation plan [Line Items] |  |  |
Key management personnel compensation |  | $ 6,487,000 |
Number of shares effected |  | 533,476 |

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- Definition The amount of compensation to key management personnel. [Refer: Key management personnel of entity or parent [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 24 -IssueDate 2017-01-01 -Paragraph 17 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=24&date=2017-03-01&anchor=para_17&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The weighted average share price. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 45 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_45_c&doctype=Standard -URIDate 2017-03-09 + Details
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- References No definition available. + Details
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- Definition The number of shares effected in plan. + References No definition available. + Details
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- Details
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- Details
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