Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues
Product sales, net	$ 4,801	$ 0	$ 5,455	$ 0
Royalties	31,704	28,517	56,484	51,441
Sale of royalty rights	0	25,000	0	25,000
Total revenues	36,505	53,517	61,939	76,441
Operating expenses
Cost of goods sold	473	0	538	0
Research and development	30,888	32,641	46,583	52,840
Selling, general and administrative	14,465	9,670	28,670	17,440
Total operating expenses	45,826	42,311	75,791	70,280
Operating (loss) income	(9,321)	11,206	(13,852)	6,161
Other income (expense)
Interest income, net	58	76	113	160
Interest expense	(3,034)	(4,467)	(6,429)	(10,001)
Other	(88)	540	(13)	472
Total other expense, net	(3,064)	(3,851)	(6,329)	(9,369)
(Loss) income before income tax expense	(12,385)	7,355	(20,181)	(3,208)
Income tax expense	4	0	4	0
Net (loss) income	$ (12,389)	$ 7,355	$ (20,185)	$ (3,208)
Net (loss) income per common and potential common share
Basic	$ (0.13)	$ 0.08	$ (0.22)	$ (0.04)
Diluted	$ (0.13)	$ 0.08	$ (0.22)	$ (0.04)
Weighted average common and potential common shares outstanding
Basic	97,321	86,903	92,886	86,880
Diluted	97,321	91,470	92,886	86,880