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Consolidated Statements of Operations and Comprehensive Income (Loss) (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Revenues: |  |  |  |
Revenue from collaborative research | $ 20,111,173 | $ 15,532,680 | $ 42,015,994 | $ 50,283,510
Grant revenue | 120,895 | 548,864 | 1,112,238 | 3,744,047
Total revenues | 20,232,068 | 16,081,544 | 43,128,232 | 54,027,557
Costs and expenses: |  |  |  |
Research and development | 11,087,919 | 11,968,253 | 32,233,828 | 36,924,987
General and administrative | 1,986,555 | 1,514,334 | 7,322,974 | 6,640,740
Total costs and expenses | 13,074,474 | 13,482,587 | 39,556,802 | 43,565,727
Income (loss) from operations | 7,157,594 | 2,598,957 | 3,571,430 | 10,461,830
Other income (expense) | (553,612) | 1,557 | (627,281) | 4,752
Net comprehensive income (loss) | $ 6,603,982 | $ 2,600,514 | $ 2,944,149 | $ 10,466,582
Basic net income (loss) per common share | $ 0.14 | $ 0.00 | $ 0.00 | $ 0.00
Diluted net income (loss) per common share | $ 0.01 | $ 0.00 | $ 0.00 | $ 0.00
Basic weighted average number of common shares | 1,184,507 | 1,092,307 | 1,463,798 | 1,078,145
Diluted weighted average number of common shares | 21,242,978 | 21,502,424 | 21,908,859 | 21,412,848

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