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Balance Sheet Components (Schedule of Property and Equipment) (Details) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2013
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Dec. 31, 2012
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|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | $ 15,241 | $ 12,689 |
| Less: accumulated depreciation and amortization | (12,099) | (10,302) |
| Property and equipment, net | 3,142 | 2,387 |
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Computer Hardware And Software [Member]
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| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | 11,341 | 9,095 |
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Furniture, Fixtures And Equipment [Member]
|
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| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | 1,944 | 1,938 |
|
Leasehold Improvements [Member]
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| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | $ 1,956 | $ 1,656 |