Consolidated Statements of Operations (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Revenues, principally from grants	$ 405,820	$ 444,642	$ 1,213,825	$ 780,438
Cost of revenues	(349,511)	(349,093)	(903,548)	(622,866)
Gross profit	56,309	95,549	310,277	157,572
Operating expenses:
Research and development	1,307,051	1,070,711	2,563,186	2,669,002
General and administrative	450,179	544,506	1,014,091	1,082,603
Stock-based compensation – research and development	206,671	39,948	323,340	80,152
Stock-based compensation – general and administrative	25,198	20,654	65,296	42,713
Total operating expenses	1,989,099	1,675,819	3,965,913	3,874,470
Loss from operations	(1,932,790)	(1,580,270)	(3,655,636)	(3,716,898)
Other income:
Interest income, net	1,473	2,977	3,908	3,345
Net loss	$ (1,931,317)	$ (1,577,293)	$ (3,651,728)	$ (3,713,553)
Basic and diluted net loss per share	$ (0.01)	$ (0.01)	$ (0.02)	$ (0.02)
Basic and diluted weighted average common shares outstanding	217,998,049	190,751,511	217,424,979	188,644,289