CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues:
Sponsored research and development	$ 1,369	$ 2,396	$ 4,938	$ 8,589
Milestones and license fees	7,988	39,238	26,255	57,714
Total revenues	9,357	41,634	31,193	66,303
Operating expenses:
Research and development	9,860	7,456	28,066	22,949
General and administrative	3,324	3,825	10,126	9,790
Cease-use expense	135	(87)	135	89
Total operating expenses	13,319	11,194	38,327	32,828
(Loss) income from operations	(3,962)	30,440	(7,134)	33,475
Other income:
Gain on sale/disposal of assets		86	25	184
Deferred gain on real estate	759	736	2,276	2,209
Investment income, net	123	102	359	341
Other income, net	2	18	9	31
Total other income	884	942	2,669	2,765
Net (loss) income	(3,078)	31,382	(4,465)	36,240
Net (loss) income per common share:
Basic	$ (0.05)	$ 0.57	$ (0.07)	$ 0.66
Diluted	$ (0.05)	$ 0.56	$ (0.07)	$ 0.64
Shares used in the calculation of net (loss) income per common share:
Basic	66,342	55,248	65,355	55,148
Diluted	66,342	56,378	65,355	56,309
Other comprehensive (loss) income:
Net (loss) income	(3,078)	31,382	(4,465)	36,240
Net unrealized gains (losses) on available-for-sale securities	162	(140)	106	(111)
Comprehensive (loss) income	$ (2,916)	$ 31,242	$ (4,359)	$ 36,129