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Shareholders' Equity, Changes in Outstanding Ordinary Shares (Details)	3 Months Ended
	Mar. 31, 2017 shares
Class A [Member]
Changes in outstanding ordinary shares [Roll Forward]
Balance, beginning of period (in shares)	65,165,672
Shares issued for share-based compensation (in shares)	1,160,133
Shares issued upon warrants exercised (in shares)	16,329
Shares issued cancelled for share-based compensation (in shares)	(100,443)
Balance, end of period (in shares)	66,241,691
Class B [Member]
Changes in outstanding ordinary shares [Roll Forward]
Balance, beginning of period (in shares)	51,154,280
Balance, end of period (in shares)	51,154,280

X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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- Definition

Refers to number of stock issued during period shares from the exercise of warrants.

+ References

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- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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- Definition

Number of shares (or other type of equity) forfeited during the period.

+ References

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- Definition

Gross number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

+ References

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