CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues:
Product sales	$ 114,219	$ 58,302	$ 27,483
Royalties	1,821	45,003	44,535
License and other revenue	31,515	12,796	18,798
Non-cash PDL royalty revenue	242,808	18,104
Total revenues	390,363	134,205	90,816
Costs and expenses:
Cost of sales	15,146	7,091	6,039
Research and development expense	7,116	8,073	15,462
Selling, General and Administrative Expense	121,126	105,176	97,646
Amortization of intangible assets	10,161	4,548	2,022
Total costs and expenses	153,549	124,888	121,169
Income (loss) from operations	236,814	9,317	(30,353)
Other (expense) income:
Interest and other income	215	662	520
Interest expense	(9,275)	(911)	(39)
Non-cash interest expense on PDL liability	(14,646)	(4,488)
Total other (expense) income	(23,706)	(4,737)	481
Net income (loss) before income taxes	213,108	4,580	(29,872)
(Provision for) benefit from income taxes	(81,346)	38,733	91
Net income (loss)	$ 131,762	$ 43,313	$ (29,781)
Basic net income (loss) per share (in dollars per share)	$ 2.26	$ 0.76	$ (0.53)
Diluted net income (loss) per share (in dollars per share)	$ 2.05	$ 0.75	$ (0.53)
Shares used in computing basic net income (loss) per share (in shares)	58,292,633	56,736,009	55,892,563
Shares used in computing diluted net income (loss) per share (in shares)	66,307,364	57,543,979	55,892,563