Balance Sheets (USD $)	Sep. 30, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 524,459	$ 3,790,352
Grant receivable	14,898	10,703
Prepaid expenses and other current assets	82,716	384,806
Total current assets	622,073	4,185,861
Property and equipment, net of accumulated depreciation of $114,827 and $107,907	19,104	24,940
Other assets	11,503	17,255
Total assets	652,680	4,228,056
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	59,546	185,643
Accrued expenses	407,051	430,996
Total current liabilities	466,597	616,639
Commitments
Stockholders' equity
Preferred stock, $.001 par value per share, 1,000,000 authorized; no shares issued
Common stock, par value $.001 per share, 200,000,000 shares authorized, 80,575,737 issued and outstanding as of September 30, 2011; 73,531,578 issued and outstanding as of December 31, 2010	80,576	73,532
Additional paid-in capital	94,777,170	93,063,201
Accumulated deficit	(94,671,663)	(89,525,316)
Total stockholders' equity	186,083	3,611,417
Total liabilities and stockholders' equity	$ 652,680	$ 4,228,056