Consolidated Statements of Operations (Unaudited) (USD $)	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Revenue:
License fees and milestones	$ 1,012,500	$ 37,500	$ 1,087,500	$ 824,167
Collaborative research and development.	250,000	250,000	750,000	750,000
Total revenue	1,262,500	287,500	1,837,500	1,574,167
Operating expense:
Research and development	5,675,394	4,700,987	16,847,529	14,406,501
General and administrative	888,887	877,177	3,051,202	2,860,052
Total operating expense	6,564,281	5,578,164	19,898,731	17,266,553
Loss from operations.	(5,301,781)	(5,290,664)	(18,061,231)	(15,692,386)
Other income (loss), net	(7,118)	(1,107)	1,484	14,607
Interest income, net	32,434	18,309	53,651	52,374
Net loss	$ (5,276,465)	$ (5,273,462)	$ (18,006,096)	$ (15,625,405)
Basic and diluted net loss per share	$ (0.07)	$ (0.08)	$ (0.25)	$ (0.25)
Weighted average shares used to compute basic and diluted net loss per share	78,119,694	62,248,265	71,933,556	61,884,023

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