Balance Sheet Components (Components of Property And Equipment) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Less: Accumulated depreciation	$ (11,653)	$ (10,325)
Total	7,974	7,709
Computer Hardware [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	8,944	8,104
Useful life	3 years
Furniture And Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	2,217	1,891
Useful life	5 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	2,051	1,997
Useful life	5 years
Software and Software Development Costs [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 6,415	$ 6,042
Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life	1 year
Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life	7 years