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Summary of Significant Accounting Policies (Details)
12 Months Ended
Dec. 31, 2017
Office equipment and furnishing [Member]  
Property, Plant and Equipment [Line Items]  
Estimated Residual Value 5.00%
Office equipment and furnishing [Member] | Maximum [Member]  
Property, Plant and Equipment [Line Items]  
Useful Life 5 years
Office equipment and furnishing [Member] | Minimum [Member]  
Property, Plant and Equipment [Line Items]  
Useful Life 3 years
Leasehold improvements [Member]  
Property, Plant and Equipment [Line Items]  
Useful Life, description Shorter of the remaining lease terms or estimated useful lives
Estimated Residual Value