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Commitments and contingencies (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure of commitments and contingent liabilities [Abstract] |
Disclosure of finance lease and operating lease by lessee [text block] | Future minimum lease payments under cancellable operating leases as follows:
|  | December 31, 2017 |  | December 31, 2016 |  | December 31, 2015 |
Within 1 year |  |  | 2,006 |  |  | 1,984 |  |  | 2,055 |
After 1 year but not more than 5 years |  |  | 7,335 |  |  | 7,362 |  |  | 6,731 |
More than 5 years |  |  | 8,814 |  |  | 10,638 |  |  | 14,128 |
Total |  |  | 18,155 |  |  | 19,984 |  |  | 22,914 |
Disclosure of finance lease and operating lease by lessor [text block] | Future minimum lease payments under cancellable operating leases as follows:
|  | December 31, 2017 |  | December 31, 2016 |  | December 31, 2015 |
Within 1 year |  |  | 300 |  |  | 289 |  |  | 455 |
After 1 year but not more than 5 years |  |  | 243 |  |  | 646 |  |  | 822 |
Total |  |  | 543 |  |  | 935 |  |  | 1,277 |

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- Definition The disclosure of finance leases and operating leases by the lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2019-01-01 -Name IAS -Number 17 -IssueDate 2017-01-01 -Paragraph 31 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2017-03-02&anchor=para_31&doctype=Standard&book=B -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2019-01-01 -Name IAS -Number 17 -IssueDate 2017-01-01 -Paragraph 35 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2017-03-02&anchor=para_35&doctype=Standard&book=B -URIDate 2017-03-09 + Details
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- Definition The disclosure of finance leases and operating leases by the lessor. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2019-01-01 -Name IAS -Number 17 -IssueDate 2017-01-01 -Paragraph 47 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2017-03-02&anchor=para_47&doctype=Standard&book=B -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2019-01-01 -Name IAS -Number 17 -IssueDate 2017-01-01 -Paragraph 56 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2017-03-02&anchor=para_56&doctype=Standard&book=B -URIDate 2017-03-09 + Details
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