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Income Taxes (Details 9) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Tax Credit Carryforward [Line Items]    
Tax effect $ 1,328 $ 4,665
US operations [Member]    
Tax Credit Carryforward [Line Items]    
Tax effect $ 1,328  
Expiration year 2020~2034