CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues:
Product sales	$ 58,302	$ 27,483	$ 41,178
Royalties	45,003	44,535	9,997
License and other revenue	12,796	18,798	81,798
Non-cash royalty revenue related to sale of future royalties to PDL	18,104
Total revenues	134,205	90,816	132,973
Costs and expenses:
Cost of sales	7,091	6,039	5,544
Research and development expense	8,073	15,462	15,187
Selling, general and administrative expense:
Promotion fee expense			27,339
Other selling, general and administrative expense	105,176	97,646	54,205
Total selling, general and administrative expense	105,176	97,646	81,544
Amortization of intangible assets	4,548	2,022
Gain on settlement agreement			(40,000)
Total costs and expenses	124,888	121,169	62,275
Income (loss) from operations	9,317	(30,353)	70,698
Other income (expense):
Interest and other income	662	520	557
Interest expense	(911)	(39)	(133)
Non-cash interest expense on liability related to sale of future royalties to PDL	(4,488)
Total other income	(4,737)	481	424
Net income (loss) before income taxes	4,580	(29,872)	71,122
Benefit from (provision for) income taxes	38,733	91	(396)
Net income (loss)	$ 43,313	$ (29,781)	$ 70,726
Basic net income (loss) per share (in dollars per share)	$ 0.76	$ (0.53)	$ 1.30
Diluted net income (loss) per share (in dollars per share)	$ 0.75	$ (0.53)	$ 1.26
Shares used in computing basic net income (loss) per share (in shares)	56,736,009	55,892,563	54,562,820
Shares used in computing diluted net income (loss) per share (in shares)	57,543,979	55,892,563	56,089,796