Consolidated Balance Sheets (USD $)	Dec. 31, 2012		Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 3,356,380		$ 5,996,668
Grants receivable	339,308		362,473
Taxes receivable			574,157
Prepaid expenses	140,693		195,762
Total current assets	3,836,381		7,129,060
Office furniture and equipment, net	12,995		15,032
Intangible assets, net	855,728		1,079,566
Total assets	4,705,104		8,223,658
Current liabilities:
Accounts payable	1,124,503		1,303,555
Accrued compensation	29,495		129,061
Total current liabilities	1,153,998		1,432,616
Commitments and contingencies
Shareholders' equity:
Preferred stock; 250,000 shares authorized; none issued or outstanding
Common stock, $.001 par value; 50,000,000 and 20,000,000 shares authorized in 2012 and 2011, respectively; 11,168,905 shares and 11,105,532 shares issued and outstanding in 2012 and 2011, respectively (1)	11,169	[1]	11,106	[1]
Additional paid-in capital (1)	125,820,318	[1]	124,897,309	[1]
Accumulated deficit	(122,280,381)		(118,117,373)
Total shareholders' equity	3,551,106		6,791,042
Total liabilities and shareholders' equity	$ 4,705,104		$ 8,223,658

[1] Adjusted to reflect the reverse stock split of 1 for 20 effective February 1, 2012.