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Government Grants (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Government Grants [Line Items]
Government Grants Recognized By Reduction Of Research and Development Expenses General and Administrative Expenses	$ 717	$ 1,431	$ 1,508

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- References

No definition available.

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- Definition

The total amount of government grants recognized by the company through reduction in research and development expenses and general and administrative expenses during the period.

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No definition available.

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