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Stock-Based Compensation and Employee Benefit Plans - Stock-Based Compensation (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
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Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2013
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Sep. 30, 2012
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||
| Stock based compensation | $ 3,463 | $ 2,609 | $ 9,591 | $ 7,165 |
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Cost of net revenue [Member]
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||
| Stock based compensation | 29 | 23 | 79 | 61 |
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Research and development [Member]
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||
| Stock based compensation | 2,183 | 1,661 | 6,095 | 4,590 |
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Selling, general and administrative [Member]
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||
| Stock based compensation | $ 1,251 | $ 925 | $ 3,417 | $ 2,514 |