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Income Taxes (Details 1) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income (loss) before income tax from discontinued operations      
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax $ 2,338 $ (728) $ (1,524)
Non-PRC [Member]      
Income (loss) before income tax from discontinued operations      
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax 0 0 0
PRC [Member]      
Income (loss) before income tax from discontinued operations      
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax $ 2,338 $ (728) $ (1,524)