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Significant Accounting Policies and Estimates (Details 2)
12 Months Ended
Dec. 31, 2017
Office equipment and computers | Minimum [Member]  
Property, Plant and Equipment, Useful Life 3 years
Office equipment and computers | Maximum [Member]  
Property, Plant and Equipment, Useful Life 5 years
Furniture and fixtures [Member] | Minimum [Member]  
Property, Plant and Equipment, Useful Life 5 years
Furniture and fixtures [Member] | Maximum [Member]  
Property, Plant and Equipment, Useful Life 8 years
Website development costs [Member] | Minimum [Member]  
Finite-Lived Intangible Asset, Useful Life 2 years
Website development costs [Member] | Maximum [Member]  
Finite-Lived Intangible Asset, Useful Life 3 years