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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Revenue:        
Royalties $ 71,013 $ 57,361 $ 194,244 $ 175,127
Contract and other revenue 2,281 169 3,835 1,481
Total revenue 73,294 57,530 198,079 176,608
Operating costs and expenses:        
Cost of revenue 8,958 [1] 7,529 [1] 22,857 [1] 22,032 [1]
Research and development 27,553 [1] 30,674 [1] 91,178 [1] 107,415 [1]
Marketing, general and administrative 18,698 [1] 24,255 [1] 57,937 [1] 91,283 [1]
Gain from sale of intellectual property 0 0 (1,388) 0
Costs of restatement and related legal activities 0 79 19 192
Restructuring charges 1,129 6,622 3,335 6,622
Impairment of Goodwill and Long Lived Assets 8,070 35,471 8,070 35,471
Gain from settlement (179) 0 (179) 0
Total operating costs and expenses 64,229 104,630 181,829 263,015
Operating income (loss) 9,065 (47,100) 16,250 (86,407)
Interest income and other income (expense), net 66 (12) (1,373) 175
Interest expense (8,552) (7,121) (23,290) (20,420)
Interest and other income (expense), net (8,486) (7,133) (24,663) (20,245)
Income (loss) before income taxes 579 (54,233) (8,413) (106,652)
Provision for income taxes 6,304 3,865 15,558 11,552
Net loss $ (5,725) $ (58,098) $ (23,971) $ (118,204)
Net loss per share:        
Basic (in dollars per share) $ (0.05) $ (0.52) $ (0.21) $ (1.07)
Diluted (in dollars per share) $ (0.05) $ (0.52) $ (0.21) $ (1.07)
Weighted average shares used in per share calculation:        
Basic (in shares) 112,640 110,826 112,144 110,580
Diluted (in shares) 112,640 110,826 112,144 110,580
[1] Includes stock-based compensation