CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues:
Net product sales	$ 16,278	$ 4,981	$ 27,113	$ 5,427
Collaborative licensing and development revenue	243	6,600	486	13,090
Royalty revenue	620	763	1,129	1,631
Total revenues	17,141	12,344	28,728	20,148
Operating expenses:
Cost of revenues	10,214	6,685	21,605	13,180
Research and development	4,857	1,872	10,762	3,166
Selling, general and administrative	14,080	10,413	27,017	21,565
Total operating expenses	29,151	18,970	59,384	37,911
Loss from operations	(12,010)	(6,626)	(30,656)	(17,763)
Other (expense) income:
Interest income	72	68	145	131
Interest expense	(1,914)	(494)	(3,433)	(1,008)
Loss on early extinguishment of debt		(1,062)	(3,398)	(1,062)
Royalty interest obligation	(161)	(143)	(247)	(425)
Other, net	(18)	(39)	(22)	(63)
Total other expense, net	(2,021)	(1,670)	(6,955)	(2,427)
Loss before income taxes	(14,031)	(8,296)	(37,611)	(20,190)
Income tax benefit			442
Net loss	$ (14,031)	$ (8,296)	$ (37,169)	$ (20,190)
Net loss per share:
Basic and diluted net loss per common share (in dollars per share)	$ (0.42)	$ (0.27)	$ (1.13)	$ (0.72)
Weighted average common shares outstanding:
Basic and diluted (in shares)	33,083,289	30,953,635	32,896,294	28,160,471