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Fair value measurement - Changes in Level 3 Liabilities and Contingent Consideration (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Changes in Level 3 liabilities
Beginning Balance	$ 3,763	$ 2,018	$ 299
Additions			1,743
Issuance of financial instruments		(10,060)
Allocation to shareholder's equity		3,614
Gain (Loss) recorded due to changes in fair value of derivative liability	(1,865)	8,501	181
Currency translation effects	2	(310)	(205)
Ending Balance	1,900	3,763	2,018
Contingent consideration
Changes in Level 3 liabilities
Beginning Balance	2,926	1,767
Additions			1,743
Gain (Loss) recorded due to changes in fair value of derivative liability	(1,080)	1,339	195
Currency translation effects	(8)	(180)	(171)
Ending Balance	$ 1,838	2,926	1,767
Contingent consideration | InoCard
Contingent consideration
Discount rate (as a percent)	30.00%
The number of months moving out of all milestones	6 months
Increase Probability of Success	20.00%
Decrease Probability Of Success	20.00%
Sensitivity down of the discount rate	20.00%
Sensitivity up of the discount rate	40.00%
Level 3 Derivative financial instruments
Changes in Level 3 liabilities
Beginning Balance	$ 837	251	299
Issuance of financial instruments		(10,060)
Allocation to shareholder's equity		3,614
Gain (Loss) recorded due to changes in fair value of derivative liability	(785)	7,162	(14)
Currency translation effects	10	(130)	(34)
Ending Balance	62	837	$ 251
Delay in milestones by 6 months | Contingent consideration | InoCard
Contingent consideration
Change in fair value	(209)	(313)
Increasing the POS for the first milestone by 20% | Contingent consideration | InoCard
Contingent consideration
Change in fair value	367	585
Decreasing the POS for the first milestone by 20% | Contingent consideration | InoCard
Contingent consideration
Change in fair value	(367)	(585)
Reducing the discount rate from 30% to 20% | Contingent consideration | InoCard
Contingent consideration
Change in fair value	638	1,228
Increasing the discount rate from 30% to 40% | Contingent consideration | InoCard
Contingent consideration
Change in fair value	$ (309)	$ (560)

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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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Amount of issuances of financial instrument the company classified as a asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Allocation to shareholder's equity 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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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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Pertains to the fair value of the contingent consideration.

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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. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of transfers of financial instrument classified as a liability into level 3 of the fair value hierarchy.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
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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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