CONDENSED STATEMENTS OF OPERATIONS (Unaudited) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenue:
License revenue	$ 0	$ 150,000	$ 0	$ 150,000
Expenses:
Research and development	2,686,465	1,886,652	7,087,980	6,707,360
General and administrative	2,091,856	2,026,602	4,006,572	4,174,061
Total Expenses	4,778,321	3,913,254	11,094,552	10,881,421
Loss before other income (expense)	(4,778,321)	(3,763,254)	(11,094,552)	(10,731,421)
Other income (expense):
Interest income	27,547	50,270	63,005	105,699
Other income, net	16,491	15,619	50,551	52,650
Loss (gain) on warrant derivative liabilities	(8,528,192)	577,290	(12,416,358)	1,177,762
Loss before provision for income taxes	(13,262,475)	(3,120,075)	(23,397,354)	(9,395,310)
Provision for income taxes	0	0	0	0
Net loss	(13,262,475)	(3,120,075)	(23,397,354)	(9,395,310)
Other comprehensive income (net of tax)
Unrealized gain on available-for-sale securities	0	379,260	0	379,260
Comprehensive loss	$ (13,262,475)	$ (2,740,815)	$ (23,397,354)	$ (9,016,050)
Basic and diluted net loss per share (in dollars per share)	$ (0.63)	$ (0.20)	$ (1.10)	$ (0.60)
Basic and diluted weighted-average shares outstanding (in shares)	21,204,499	15,603,867	21,203,754	15,603,812