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Balance Sheet Components (Components of Property And Equipment) (Details) (USD $) In Thousands, unless otherwise specified			12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Computer Hardware [Member]	Dec. 31, 2012 Furniture And Fixtures [Member]	Dec. 31, 2012 Leasehold Improvements [Member]	Dec. 31, 2012 Software [Member]
Property, Plant and Equipment [Line Items]
Computer hardware	$ 6,906	$ 5,710
Furniture and fixtures	2,046	1,474
Leasehold improvements	1,775	1,801
Software	2,006	1,494
Less: Accumulated depreciation	(8,335)	(6,989)
Total	$ 4,398	$ 3,490
Useful life			3 years	5 years	5 years	1 year

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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- 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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