CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Revenue:
Grant revenue	$ 443	$ 21	$ 567	$ 26
License fee and royalty revenue from related parties	26	25	419	97
Research and development revenue				212
Total revenue	469	46	986	335
Operating expense:
Research and development expenses, including cost of revenue	6,153	5,906	18,352	17,912
Selling, general, and administrative expenses	3,895	4,161	11,878	11,878
Total operating expenses	10,048	10,067	30,230	29,790
Loss from operations	(9,579)	(10,021)	(29,244)	(29,455)
Other income (expense):
Interest income, net	19	30	62	119
Net loss	$ (9,560)	$ (9,991)	$ (29,182)	$ (29,336)
Net loss per share:
Basic and Diluted (in dollars per share)	$ (0.28)	$ (0.37)	$ (0.96)	$ (1.10)
Number of shares used in per share calculations:
Basic (in shares)	34,080,177	26,880,595	30,295,881	26,733,969
Diluted (in shares)	34,080,177	26,880,595	30,295,881	26,733,969