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Board of Directors, Senior Management and Key management personnel (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2019 Employees	Dec. 31, 2018 Employees
Related party disclosures [Line Items]
Key management personnel compensation	$ 22,598	$ 27,907	$ 27,367
Number of employees	124	123		5,741	5,290
Chairman [Member] | Fixed compensation [Member]
Related party disclosures [Line Items]
Key management personnel compensation	$ 800	$ 400
Chairman [Member] | Variable compensation [Member] | National currency [Member]
Related party disclosures [Line Items]
Key management personnel compensation, Percentage		0.12%
Chairman [Member] | Variable compensation [Member] | Local currency [Member]
Related party disclosures [Line Items]
Key management personnel compensation, Percentage	0.06%
Vice-president [Member] | Fixed compensation [Member]
Related party disclosures [Line Items]
Key management personnel compensation		$ 350
Directors [Member] | Fixed compensation [Member]
Related party disclosures [Line Items]
Key management personnel compensation	$ 700	350
Directors [Member] | Variable compensation [Member] | National currency [Member]
Related party disclosures [Line Items]
Key management personnel compensation, Percentage	0.12%
Directors [Member] | Variable compensation [Member] | Local currency [Member]
Related party disclosures [Line Items]
Key management personnel compensation, Percentage	0.06%
Directors committee [Member]
Related party disclosures [Line Items]
Key management personnel compensation	$ 4,527	3,791	$ 3,231
Directors committee [Member] | Fixed compensation [Member]
Related party disclosures [Line Items]
Key management personnel compensation	$ 200	$ 113
Directors committee [Member] | Variable compensation [Member] | Local currency [Member]
Related party disclosures [Line Items]
Key management personnel compensation, Percentage	0.02%	0.02%
Health, Safety and Environmental Matters Committee [Member] | Fixed compensation [Member]
Related party disclosures [Line Items]
Key management personnel compensation	$ 100	$ 50
Corporate Governance Committee [Member] | Fixed compensation [Member]
Related party disclosures [Line Items]
Key management personnel compensation	$ 100	$ 50

X

- 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
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-Number 24
-IssueDate 2019-01-01
-Paragraph 17
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- Definition

The number of personnel employed by the entity at a date.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard
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- Definition

The percentage of compensation in profits to key management personnel.

+ References

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