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Condensed Consolidated Statements of Operations (Unaudited) (USD $) | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Revenue: |  |
Revenue from licensing agreements, grants and other | $ 75,642 | $ 372,677
Revenue from product sales | 208,558 | 271,359
Total revenue | 284,200 | 644,036
Cost of product sales | 66,841 | 71,959
Gross profit | 217,359 | 572,077
Operating expenses: |  |
Research and development | 4,563,890 | 3,938,391
Selling, general and administrative | 1,887,757 | 1,924,325
Wind-down expenses | 22,859 | 35,155
Total operating expenses | 6,474,506 | 5,897,871
Loss from operations | (6,257,147) | (5,325,794)
Other income (expense): |  |
Change in fair value of warrant liability | (188,607) | (4,941,177)
Interest income | 6,846 | 4,210
Interest expense | (10,148) | (14,447)
Other income (expense), net | 32,609 | 47,769
Total other income (expense), net | (159,300) | (4,903,645)
Net loss | $ (6,416,447) | $ (10,229,439)
Basic and diluted net loss per share | $ (0.17) | $ (0.45)
Weighted average number of common shares outstanding, basic and diluted | 38,263,434 | 22,958,498

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