Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2017
Computer hardware and software [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life	3 years
Computer hardware and software [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life	5 years
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life	5 years
Mobile equipment [Member]
Property, Plant and Equipment [Line Items]
Estimated Useful Life	3 years