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Earnings per share (Details Text)	12 Months Ended
	Dec. 31, 2017 shares
Disclosure Of Instruments With Potential Future Dilutive Effect Not Included In Calculation Of Diluted Earnings Per Share Explanatory [Abstract]
Amount of antidilutive shares	17,282,925

X

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

No definition available.

+ Details

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X

- Definition

The description of instruments (including contingently issuable shares) that could potentially dilute basic earnings per share in the future, but were not included in the calculation of diluted earnings per share because they are antidilutive for the period(s) presented.

+ References

No definition available.

+ Details

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