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Description of Business and Summary of Significant Accounting Policies - Property and Equipment, Net (Details)	12 Months Ended
	Dec. 31, 2017
Computer and network equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful life, in years	3 years
Computer and network equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful life, in years	5 years
Computer software
Property, Plant and Equipment [Line Items]
Useful life, in years	3 years
Development costs | Minimum
Property, Plant and Equipment [Line Items]
Useful life, in years	1 year
Development costs | Maximum
Property, Plant and Equipment [Line Items]
Useful life, in years	5 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Useful life, in years	7 years

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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- Details

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- Details

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