Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenues:
Product sales, net	$ 17,871	$ 654
Royalties	26,169	24,780
Total revenues	44,040	25,434
Cost of sales	1,877	65
Operating expenses:
Research and development	20,557	15,695
Selling, general and administrative	24,554	14,205
Total operating expenses	45,111	29,900
Operating loss	(2,948)	(4,531)
Other income (expense)
Interest income, net	121	55
Interest expense	(4,035)	(3,395)
Other	297	75
Total other expense, net	(3,617)	(3,265)
Loss before income tax expense	(6,565)	(7,796)
Income tax expense	11	0
Net loss	$ (6,576)	$ (7,796)
Net loss per common and potential common share
Basic	$ (0.06)	$ (0.09)
Diluted	$ (0.06)	$ (0.09)
Weighted average common and potential common shares outstanding
Basic	103,612	88,402
Diluted	103,612	88,402