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Goodwill and intangible assets (Tables) | 12 Months Ended
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Dec. 31, 2018
Intangible Assets And Goodwill [Abstract] |
Reconciliation of carrying amount of goodwill and intangibles |
At December 31, 2018 |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  | Intellectual |  |  |  |
|  | Goodwill |  | Contracts |  | property |  | Patents |  | Total
Cost |  |  |  |  |  |  |  |  |  |
Beginning of year | $ | 111,399 | $ | 109,812 | $ | 118,819 | $ | 10,966 | $ | 350,996
Effect of movements in exchange rates |  | - |  | 9,559 |  | - |  | - |  | 9,559
End of year |  | 111,399 |  | 119,371 |  | 118,819 |  | 10,966 |  | 360,555
Accumulated amortization and impairment |  |  |  |  |  |  |  |  |  |
Beginning of year |  | 111,399 |  | 104,939 |  | 53,680 |  | 10,966 |  | 280,984
Amortization charge |  | - |  | 1,325 |  | 3,474 |  | - |  | 4,799
Effect of movements in exchange rates |  | - |  | 9,170 |  | - |  | - |  | 9,170
End of year |  | 111,399 |  | 115,434 |  | 57,154 |  | 10,966 |  | 294,953
Net book value at December 31, 2018 | $ | - | $ | 3,937 | $ | 61,665 | $ | - | $ | 65,602
At December 31, 2017 |  |  |  |  |  |  |  |  |  |
|  |  |  |  |  | Intellectual |  |  |  |
|  | Goodwill |  | Contracts |  | property |  | Patents |  | Total
Cost |  |  |  |  |  |  |  |  |  |
Beginning of year | $ | 118,664 | $ | 117,533 | $ | 118,819 | $ | 11,737 | $ | 366,753
Effect of movements in exchange rates |  | (7,265) |  | (7,721) |  | - |  | (771) |  | (15,757)
End of year |  | 111,399 |  | 109,812 |  | 118,819 |  | 10,966 |  | 350,996
Accumulated amortization and impairment |  |  |  |  |  |  |  |  |  |
Beginning of year |  | - |  | 110,284 |  | 49,589 |  | 3,570 |  | 163,443
Amortization charge |  | - |  | 2,002 |  | 4,091 |  | 630 |  | 6,723
Impairment charge |  | 111,399 |  | - |  | - |  | 7,150 |  | 118,549
Effect of movements in exchange rates |  | - |  | (7,347) |  | - |  | (384) |  | (7,731)
End of year |  | 111,399 |  | 104,939 |  | 53,680 |  | 10,966 |  | 280,984
Net book value at December 31, 2017 | $ | - | $ | 4,873 | $ | 65,139 | $ | - | $ | 70,012

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- Definition The disclosure of the reconciliation of changes in intangible assets and goodwill. [Refer: Intangible assets and goodwill] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 38 -IssueDate 2018-01-01 -Paragraph 118 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=38&date=2018-03-01&anchor=para_118&doctype=Standard -URIDate 2018-03-16 + Details
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- References No definition available. + Details
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