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CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Cost of revenue
     
Stock-based compensation $ 20 $ 575 $ 173
Research and development
     
Stock-based compensation 9,546 10,519 10,165
Selling, General and Administrative Expenses
     
Stock-based compensation $ 12,980 $ 16,902 $ 20,210