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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Product revenues | $ 2,341 |
Operating Expenses: |  |
Cost of goods sold | 1,287 |
Selling, general and administrative | 39,267 | 14,027
Research and development | 21,838 | 4,756
Total operating expenses | 62,392 | 18,783
Operating loss | (60,051) | (18,783)
Gain (loss) on change in fair value of derivative liabilities | 3,620 | (66,209)
Interest expense, net | (8,860) | (3,951)
Other (expense) income, net | (124) | 68
Loss from operations before taxes | (65,415) | (88,875)
Benefit from income taxes | 3,257 | 590
Net loss | $ (62,158) | $ (88,285)
Loss per share: |  |
Basic and diluted | $ (0.41) | $ (0.65)
Weighted average shares: |  |
Basic and diluted | 150,430 | 136,011

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