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Pensions - Defined benefit obligation (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan As Recognized In The Statement Of Financial Position [Abstract]
Present value of the defined benefit obligation	$ 1,971	$ 1,481	$ 1,128
Fair value of plan assets	1,614	1,266	963
Net pension obligation	357	215	165
Remeasurement loss	182	211	60
Net balance sheet recorded pension liability December 31	$ 539	$ 425	$ 225

X

- Definition

The defined benefit plan as recognized in the statement of financial position.

+ References

No definition available.

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- Definition

The amount of the remeasurement loss to the defined benefit plan.

+ References

No definition available.

+ Details

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- Definition

Amount of net defined benefit plan obligation.

+ References

No definition available.

+ Details

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- Definition

The amount of current net defined benefit liability. [Refer: Net defined benefit liability]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_55&doctype=Standard
-URIDate 2017-03-09

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X

- Definition

The present value, without deducting any plan assets, of expected future payments required to settle the obligation resulting from employee service in the current and prior periods. [Refer: Plan assets, at fair value]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2017-01-01
-Paragraph 57
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_57_a&doctype=Standard
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X

- Definition

The fair value of defined benefit plan assets. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. [Refer: At fair value [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-IssueDate 2017-01-01
-Paragraph 57
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-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_57_a&doctype=Standard
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