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Stock Based Compensation - Stock-Based Compensation Expense (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
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Sep. 30, 2012
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Sep. 30, 2011
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Sep. 30, 2012
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Sep. 30, 2011
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| Amortization of stock-based compensation: | ||||
| Stock-based compensation expense | $ 944 | $ 292 | $ 2,087 | $ 743 |
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Research And Development [Member]
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| Amortization of stock-based compensation: | ||||
| Stock-based compensation expense | 471 | 141 | 1,082 | 328 |
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General And Administrative [Member]
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| Amortization of stock-based compensation: | ||||
| Stock-based compensation expense | $ 473 | $ 151 | $ 1,005 | $ 415 |
| X | ||||||||||
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- Details
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- Definition
Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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