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Condensed Consolidated Statements of Operations (Unaudited) (USD $)
 3 Months Ended 9 Months Ended 135 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Grant revenue $ 638,000 $ 1,297,006 $ 2,197,761 $ 3,943,041 $ 22,509,453
Operating expenses:          
Research and development 601,690 1,089,938 2,386,460 3,313,857 28,017,136
General and administrative 334,166 583,386 1,339,300 1,824,579 18,986,959
Total operating expenses 935,856 1,673,324 3,725,760 5,138,436 47,004,095
Loss from operations (297,856) (376,318) (1,527,999) (1,195,395) (24,494,642)
Other income (expense):          
Interest income 1,077 466 2,944 1,917 343,254
Interest expense         (5,669)
Total other income (expense) 1,077 466 2,944 1,917 337,585
Net loss $ (296,779) $ (375,852) $ (1,525,055) $ (1,193,478) $ (24,157,057)
Basic and diluted:          
Loss per common share (in Dollars per share) $ (0.02) $ (0.02) $ (0.09) $ (0.08) $ (2.13)
Weighted average shares outstanding (in Shares) 18,497,886 15,764,525 17,400,665 15,716,767 11,338,436