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Summary of significant accounting policies (Details) $ in Millions		1 Months Ended	6 Months Ended
	Aug. 04, 2014 state	Aug. 31, 2014	Jun. 30, 2015 USD ($)
Minimum age of ambulatory patient	5 years	5 years
Number of member states of the European Union | state	28
Maximum
Royalties revenue			$ 0.1

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Represents the minimum age of ambulatory patient.

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- Definition

Represents the number of states of European union

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Revenue earned during the period from the leasing or otherwise lending to a third party the entity's rights or title to certain property. Royalty revenue is derived from a percentage or stated amount of sales proceeds or revenue generated by the third party using the entity's property. Examples of property from which royalties may be derived include patents and oil and mineral rights.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 225



-SubTopic 10



-Section S99



-Paragraph 2



-Subparagraph (SX 210.5-03.1(e))



-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 03



-Paragraph 1



-Article 5

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