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Income Taxes (Details Textual)
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Income Taxes (Textual)        
Statutory tax rate 25.00% 25.00% 25.00% 25.00%
Effective income tax rate 24.30% 25.40% 25.10% 32.90%
Income tax, statute of limitations period     5 years  
United States [Member]        
Income Taxes (Textual)        
Statutory tax rate     34.00%  
State tax rates     0.00%  
PRC [Member]        
Income Taxes (Textual)        
Statutory tax rate     25.00%