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Settlement Agreement with Samsung (Details) (USD $)
Share data in Millions, unless otherwise specified
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jan. 31, 2010
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Dec. 31, 2010
Settlement Agreement with Samsung          
Period of non-exclusive rights to certain patents (in years) 5        
Issuance of common stock due to the settlement with Samsung (in shares) 9.6        
Litigation settlement payments by Samsung     $ 50,000,000    
Revenue     43,800,000   181,200,000
Gain from settlement   10,300,000 6,200,000 106,200,000 126,800,000
Remaining balance to be received     350,000,000    
Approximate proceeds under license agreement (per quarter), due to settlement agreement with Samsung     $ 25,000,000