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Condensed Consolidated Statements of Operations (Unaudited) (USD $)
 3 Months Ended 9 Months Ended 147 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Grant revenue $ 1,004,211 $ 638,000 $ 2,242,812 $ 2,197,761 $ 25,211,831
Operating expenses:          
Research and development 879,104 601,690 2,314,291 2,386,460 30,988,489
General and administrative 316,452 334,166 1,345,179 1,339,300 20,745,603
Total operating expenses 1,195,556 935,856 3,659,470 3,725,760 51,734,092
Loss from operations (191,345) (297,856) (1,416,658) (1,527,999) (26,522,261)
Other income (expense):          
Interest income 1,197 1,077 3,429 2,944 347,559
Interest expense         (5,669)
Total other income (expense) 1,197 1,077 3,429 2,944 341,890
Net loss $ (190,148) $ (296,779) $ (1,413,229) $ (1,525,055) $ (26,180,371)
Basic and diluted:          
Loss per common share (in Dollars per share) $ (0.01) $ (0.02) $ (0.07) $ (0.09) $ (2.18)
Weighted average shares outstanding (in Shares) 21,666,610 18,497,886 20,979,675 17,400,665 12,026,183