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Government Grants (Details Textual) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Government Grants [Line Items]      
Government Grants Recognized By Reduction Of Research and Development Expenses General and Administraive Expenses $ 2,011 $ 216 $ 688