CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (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
Collaboration revenues:
Product revenue	$ 83,848		$ 159,608
Research and development revenue	3,648	2,795	6,060	6,485
Total collaboration revenue	87,496	2,795	165,668	6,485
Operating expenses:
Research and development	14,168	11,778	27,111	24,033
General and administrative	9,205	5,959	17,515	13,434
Total operating expenses	23,373	17,737	44,626	37,467
Operating income (loss)	64,123	(14,942)	121,042	(30,982)
Other income (expense):
Interest income	176	26	304	86
Interest expense	(34)	(88)	(75)	(192)
Total other income (expense)	142	(62)	229	(106)
Net income (loss)	$ 64,265	$ (15,004)	$ 121,271	$ (31,088)
Net income (loss) per share:
Basic (in dollars per share)	$ 1.29	$ (0.34)	$ 2.44	$ (0.71)
Diluted (in dollars per share)	$ 1.26	$ (0.34)	$ 2.39	$ (0.71)
Weighted average shares outstanding:
Basic (in shares)	49,708	44,069	49,620	43,911
Diluted (in shares)	51,001	44,069	50,668	43,911