Balance Sheet Components (Components of Property And Equipment) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Jun. 30, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Less: Accumulated depreciation	$ (9,648)	$ (8,335)
Total	8,650	4,398
Computer Hardware [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	8,205	6,906
Useful life	3 years
Furniture And Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	2,155	2,046
Useful life	5 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	1,981	1,775
Useful life	5 years
Software [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 5,957	$ 2,006
Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life	1 year
Maximum [Member] \| Software [Member]
Property, Plant and Equipment [Line Items]
Useful life	7 years

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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