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Consolidated Statements of Operations and Comprehensive Income (Loss) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Revenues:        
Revenue from collaborative research $ 18,283 $ 20,111 $ 41,886 $ 42,016
Grant revenue 99 121 435 1,112
Total revenues 18,382 20,232 42,321 43,128
Costs and expenses:        
Research and development 18,632 11,088 50,536 32,234
General and administrative 3,678 1,986 11,081 7,323
Total costs and expenses 22,310 13,074 61,617 39,557
Income (loss) from operations (3,928) 7,158 (19,296) 3,571
Other income (expense)   (554) 1 (627)
Net comprehensive income (loss) $ (3,928) $ 6,604 $ (19,295) $ 2,944
Basic net income (loss) per common share $ (0.14) $ 0.14 $ (0.71) $ 0.00
Diluted net income (loss) per common share $ (0.14) $ 0.01 $ (0.71) $ 0.00
Basic weighted average common shares outstanding 27,751,437 1,184,507 27,227,151 1,463,798
Diluted weighted average common shares outstanding 27,751,437 21,242,979 27,227,151 21,908,859