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Condensed Consolidated Statements of Operations (Unaudited) (USD $) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Revenue: |  |  |  |
Revenue from licensing agreements and grants | $ 38,085 | $ 49,257 | $ 410,762 | $ 121,349
Revenue from product sales | 210,749 | 184,840 | 482,108 | 334,215
Total revenue | 248,834 | 234,097 | 892,870 | 455,564
Cost of product sales | 64,277 | 52,365 | 136,236 | 106,889
Gross profit | 184,557 | 181,732 | 756,634 | 348,675
Operating expenses: |  |  |  |
Research and development | 3,749,066 | 5,053,834 | 7,687,457 | 10,579,511
Selling, general and administrative | 1,775,342 | 2,103,262 | 3,699,667 | 4,178,991
Wind-down expenses | 9,902 | 114,918 | 45,057 | 190,055
Total operating expenses | 5,534,310 | 7,272,014 | 11,432,181 | 14,948,557
Loss from operations | (5,349,753) | (7,090,282) | (10,675,547) | (14,599,882)
Other income (expense): |  |  |  |
Change in fair value of warrant liability | 6,205,957 | 3,020,228 | 1,264,780 | 4,803,183
Realized gain on sale of marketable securities |  | 83,750 |  | 83,750
Interest income | 2,811 | 6,446 | 7,021 | 7,818
Interest expense | (14,175) | (19,793) | (28,622) | (40,000)
Other income (expense) | (11,318) | (35,542) | 36,451 | (37,297)
Total other income, net | 6,183,275 | 3,055,089 | 1,279,630 | 4,817,454
Net income (loss) | $ 833,522 | $ (4,035,193) | $ (9,395,917) | $ (9,782,428)
Basic and diluted net income (loss) per share | $ 0.03 | $ (0.29) | $ (0.39) | $ (0.71)
Weighted average number of common shares outstanding, basic and diluted | 24,806,769 | 13,802,372 | 23,882,634 | 13,741,481

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