Consolidated Balance Sheets (USD $)	Sep. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 7,218,275	$ 7,451,714
Grants receivable	297,847	120,787	[1]
Other receivable	0	251,864	[1]
Prepaid expenses	154,670	187,494	[1]
Total current assets	7,670,792	8,011,859	[1]
Office furniture and equipment, net	16,813	20,699	[1]
Intangible assets, net	1,227,497	1,235,989	[1]
Total assets	8,915,102	9,268,547	[1]
Current liabilities:
Accounts payable	1,371,943	1,674,175	[1]
Accrued compensation	41,894	236,581	[1]
Total current liabilities	1,413,837	1,910,756	[1]
Shareholders equity
Preferred stock; 5,000,000 shares authorized; none issued or outstanding	0	0	[1]
Common stock, $.001 par value; 400,000,000 shares authorized; 220,985,710 shares and 216,192,360 shares issued and outstanding in 2011 and 2010, respectively	220,986	216,192	[1]
Additional paid-in capital	124,465,912	122,880,378	[1]
Accumulated deficit	(117,185,633)	(115,738,779)	[1]
Total shareholders equity	7,501,265	7,357,791
Total liabilities and shareholders’ equity	$ 8,915,102	$ 9,268,547	[1]

[1] * Derived from audited information