Consolidated Statements of Operations (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statements of Operations [Abstract]
Revenues, principally from grants	$ 312,491	$ 931,627	$ 1,845,123	$ 2,341,896
Cost of revenues	(245,864)	(761,628)	(1,517,469)	(1,934,529)
Gross profit	66,627	169,999	327,654	407,367
Operating expenses:
Research and development	1,216,559	371,338	4,113,686	1,749,112
General and administrative	710,730	558,877	1,918,411	1,841,138
Total operating expenses	1,927,289	930,215	6,032,097	3,590,250
Loss from operations	(1,860,662)	(760,216)	(5,704,443)	(3,182,883)
Other income (expense):
Change in fair value of warrant liability	(4,699,846)		(5,349,422)
Interest income, net	652	1,250	1,438	5,284
Net loss	$ (6,559,856)	$ (758,966)	$ (11,052,427)	$ (3,177,599)
Basic and diluted net loss per share	$ (0.34)	$ (0.07)	$ (0.78)	$ (0.29)
Basic and diluted weighted average common shares outstanding	19,040,339	11,138,373	14,160,157	11,127,374