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Fair value measurement - Changes in Level 3 Liabilities and Contingent Consideration (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended	9 Months Ended		12 Months Ended
	Aug. 31, 2017	Jun. 30, 2017	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2014
Changes in Level 3 liabilities
Beginning Balance				$ 1,900	$ 3,763	$ 3,763
(Gains) / losses recognized in profit or loss				2,675	(2,270)
Amounts due (presented in Accrued expenses and other current liabilities)				(1,181)
Currency translation effects				254	107
Ending Balance			$ 3,648	3,648	1,600	1,900
Contingent consideration
Risk-free adjusted discount rate (as a percent)		30.00%
Company's weighted average rate of capital		14.50%
Percentage of future milestones that can be settled with ordinary shares							100.00%
Percentage of future milestones that can be settled with ordinary shares, reduced rate	50.00%
Increase in fair value of the contingent consideration		$ 300	2,300	2,300
Contingent consideration
Changes in Level 3 liabilities
Beginning Balance				1,838	2,926	2,926
(Gains) / losses recognized in profit or loss				2,704	(1,569)
Amounts due (presented in Accrued expenses and other current liabilities)				(1,181)
Currency translation effects				249	87
Ending Balance			3,610	$ 3,610	1,444	$ 1,838
Contingent consideration | InoCard
Contingent consideration
Moving out of all milestones, in months				6 months		6 months
Increasing the POS for the first milestone				20.00%		20.00%
Decreasing the POS for the first milestone				20.00%		20.00%
Reducing the discount rate				4.50%		20.00%
Increasing the discount rate				24.50%		40.00%
Level 3 Derivative financial instruments
Changes in Level 3 liabilities
Beginning Balance				$ 62	837	$ 837
(Gains) / losses recognized in profit or loss				(29)	(701)
Currency translation effects				5	20
Ending Balance			$ 38	38	$ 156	62
Delay in milestones by 6 months | Contingent consideration | InoCard
Contingent consideration
Change in fair value				(231)		(209)
Increasing the POS for the first milestone by 20% | Contingent consideration | InoCard
Contingent consideration
Change in fair value				1,103		367
Decreasing the POS for the first milestone by 20% | Contingent consideration | InoCard
Contingent consideration
Change in fair value				(1,103)		(367)
Reducing the discount rate from 30% to 20% | Contingent consideration | InoCard
Contingent consideration
Change in fair value				1,004		638
Increasing the discount rate from 30% to 40% | Contingent consideration | InoCard
Contingent consideration
Change in fair value				$ (590)		$ (309)

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Represents the fair value decrease probability of success.

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Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value sensitivity down.

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Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value sensitivity up.

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Represents the fair value increase probability of success.

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Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis, Amounts Due

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Currency translation effects to financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Represents the number of months moving out of all milestones.

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Percentage of future milestones that can be settled with ordinary shares.

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Percentage of future milestones that can be settled with ordinary shares, reduced rate

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Weighted average rate of capital

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Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 4
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479

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- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

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Amount of gain (loss) recognized on the income statement for financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of increase (decrease) of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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