Condensed Statements of Operations (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
REVENUE
Grant revenue				$ 51,870
Royalty revenue	81,003		138,003	2,228,004
Total Revenue	81,003		138,003	2,279,874
EXPENSES
Research and development	11,116,323	8,657,606	25,980,744	18,084,476
General and administration	1,989,103	1,540,200	3,582,659	3,307,202
Depreciation and amortization	40,519	42,546	82,463	87,967
Total Expenses	13,145,945	10,240,352	29,645,866	21,479,645
OTHER
Convertible note fair value adjustment	(1,753,000)	(381,916)	(2,392,000)	(1,790,916)
Interest expense	(172,000)	(172,083)	(344,000)	(344,083)
Other income	13,000		13,000
Interest income	1,711		4,956
NET LOSS	$ (14,975,231)	$ (10,794,351)	$ (32,225,907)	$ (21,334,770)
BASIC NET LOSS PER SHARE (in dollars per share)	$ (0.16)	$ (0.17)	$ (0.36)	$ (0.35)
DILUTED NET LOSS PER SHARE (in dollars per share)	$ (0.16)	$ (0.17)	$ (0.36)	$ (0.35)
WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING (in shares)	93,985,347	64,607,893	89,400,401	60,207,044