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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Revenues            
Operating Expenses:        
Research and development 14,066 5,189 18,822 9,638
Marketing, general and administrative 13,635 10,025 27,662 12,751
Total operating expenses 27,701 15,214 46,484 22,389
Operating loss 27,701 15,214 46,484 22,389
Loss on change in fair value of derivative liability 18,930 185,359 85,139 160,017
Interest expense (income), net 4,317 (94) 8,268 (95)
Other expense (income), net 52 (11) (16) (88)
Loss from operations before taxes 51,000 200,468 139,875 182,223
Provision for income taxes 2,904 1,635 2,314 1,586
Net loss $ 53,904 $ 202,103 $ 142,189 $ 183,809
Loss per share:        
Basic and diluted $ 0.38 $ 1.58 $ 1.03 $ 1.46
Weighted average shares:        
Basic and diluted 140,550 128,360 138,280 125,907