CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues:
Product sales	$ 28,245	$ 14,106	$ 49,751	$ 23,235
Royalties	430	15,097	925	29,178
License and other revenue	5,760	760	17,520	3,724
Non-cash PDL royalty revenue	33,297		76,081
Total revenues	67,732	29,963	144,277	56,137
Costs and expenses:
Cost of sales	4,675	1,688	8,377	3,172
Research and development expense	1,397	1,412	3,439	4,710
Selling, general and administrative expense	32,573	25,368	65,090	51,331
Amortization of intangible assets	2,542	963	5,081	1,924
Total costs and expenses	41,187	29,431	81,987	61,137
Income (loss) from operations	26,545	532	62,290	(5,000)
Other income (expense):
Interest and other income	20	46	47	115
Interest expense	(616)	(40)	(1,243)	(156)
Non-cash interest expense on liability related to sale of future royalties and milestones to PDL	(4,903)		(10,282)
Total other expense	(5,499)	6	(11,478)	(41)
Net income (loss) before income taxes	21,046	538	50,812	(5,041)
Benefit from (provision for) for income taxes	(8,300)	(60)	(20,128)	39
Net income (loss)	$ 12,746	$ 478	$ 30,684	$ (5,002)
Basic net income (loss) per share (in dollars per share)	$ 0.22	$ 0.01	$ 0.53	$ (0.09)
Diluted net income (loss) per share (in dollars per share)	$ 0.21	$ 0.01	$ 0.51	$ (0.09)
Shares used in computing basic net income (loss) per share (in shares)	58,105,902	56,562,433	57,827,430	56,511,911
Shares used in computing diluted net income (loss) per share (in shares)	60,430,456	57,142,343	60,258,445	56,511,911