Quarterly report pursuant to Section 13 or 15(d)

Stock Award Plans (Details)

v2.4.0.6
Stock Award Plans (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Stock-based compensation expense related to stock-based awards        
Total stock-based compensation expense $ 3,245 $ 3,090 $ 9,354 $ 10,127
Research and development
       
Stock-based compensation expense related to stock-based awards        
Total stock-based compensation expense 1,866 2,236 5,213 7,086
General and administrative
       
Stock-based compensation expense related to stock-based awards        
Total stock-based compensation expense $ 1,379 $ 854 $ 4,141 $ 3,041