Summary of Significant Accounting Policies - Property Plant and Equipment (Details)	12 Months Ended
	Dec. 31, 2016
Computer Hardware | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	2 years
Computer Hardware | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Computer Software | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	2 years
Computer Software | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Leasehold Improvements | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years