The Company, Basis of Presentation and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

The Company, Basis of Presentation and Summary of Significant Accounting Policies

Revenues from Customers or Aggregate Purchases through Digital Storefronts Accounted for More Than Ten Percent of Revenues

	Year Ended December 31,
	2016		2015		2014
Apple	52.7	%	51.7	%	52.2	%
Google	27.6	%	27.4	%	24.8	%

Schedule of Depreciation And Amortization Periods for Property and Equipment

Computer equipment	Three years
Computer software	Three years
Furniture and fixtures	Three years
Leasehold improvements	Shorter of the estimated useful life or remaining term of lease