STOCK-BASED COMPENSATION (Details) (USD $)
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12 Months Ended | ||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Stock-based compensation expense related to stock-based awards | |||
Total stock-based compensation expense | $ 12,617,000 | $ 13,168,000 | $ 16,436,000 |
Research and development
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Stock-based compensation expense related to stock-based awards | |||
Total stock-based compensation expense | 7,050,000 | 9,277,000 | 9,025,000 |
General and administrative
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Stock-based compensation expense related to stock-based awards | |||
Total stock-based compensation expense | $ 5,567,000 | $ 3,891,000 | $ 7,411,000 |
X | ||||||||||
- 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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X | ||||||||||
- Details
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