CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenues:
Product sales	$ 31,670	$ 21,506
Royalties	533	494
License and other revenue		11,760
Non-cash PDL royalty revenue		42,784
Total revenues	32,203	76,544
Costs and expenses:
Cost of sales	3,112	3,702
Research and development expense	1,858	2,042
Selling, general and administrative expense	34,542	32,517
Amortization of intangible assets	2,540	2,539
Total costs and expenses	42,052	40,800
(loss) income from operations	(9,849)	35,744
Other (expense) income:
Interest and other income	57	27
Interest expense	(6,022)	(626)
Non-cash interest expense on PDL liability		(5,379)
Total other expense	(5,965)	(5,978)
Net (loss) income before income taxes	(15,814)	29,766
Benefit from (provision for) income taxes	4,181	(11,827)
Net (loss) income	$ (11,633)	$ 17,939
Basic net (loss) income per share (in dollars per share)	$ (0.20)	$ 0.31
Diluted net (loss) income per share (in dollars per share)	$ (0.20)	$ 0.30
Shares used in computing basic net income per share (in shares)	59,560,873	57,545,862
Shares used in computing diluted net income per share (in shares)	59,560,873	59,923,083