Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Revenues:
License fees	$ 1,077	$ 2,426	$ 2,153	$ 4,853
Sponsored research	132		222
Reimbursable research and development costs	967	1,095	1,571	1,942
Total revenues	2,176	3,521	3,946	6,795
Operating expenses:
Research and development	15,527	12,884	28,242	23,135
General and administrative	4,769	3,319	9,018	6,246
Total operating expenses	20,296	16,203	37,260	29,381
Loss from operations	(18,120)	(12,682)	(33,314)	(22,586)
Other income (expense):
Interest income	98	111	205	180
Interest expense	(98)	(229)	(232)	(490)
Other income, net	6	13	9	26
Total other income (expense)	6	(105)	(18)	(284)
Net loss	$ (18,114)	$ (12,787)	$ (33,332)	$ (22,870)
Basic and diluted net loss per share	$ (0.68)	$ (0.57)	$ (1.27)	$ (1.11)
Shares used in computing basic and diluted net loss per share	26,687	22,556	26,241	20,568

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