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
Revenue
Net product sales	$ 11,552
Licensing revenue	467	1,480	803
Total revenue	12,019	1,480	803
Costs and expenses
Cost of product sales	1,104
Research and development	17,245	23,517	30,627
Selling, general and administrative	55,590	20,132	7,928
Total costs and expenses	73,939	43,649	38,555
Operating loss	(61,920)	(42,169)	(37,752)
Other income (expense)
Interest income	299	120	31
Interest expense	(7,849)	(3,575)	(1,866)
Changes in fair value of derivative liabilities	(13,354)	(710)	(85)
Loss on extinguishment of debt	(9,550)
Other income	101	50	202
Total other expense	(30,353)	(4,115)	(1,718)
Loss from continuing operations before income tax benefit	(92,273)	(46,284)	(39,470)
Income tax benefit	0	0	16,245
Loss from continuing operations	(92,273)	(46,284)	(23,225)
Discontinued operations:
Income from discontinued operations, net of tax			2,188
Gain on disposal of discontinued operations, net of tax			74,852
Income from discontinued operations			77,040
Net (loss) income	(92,273)	(46,284)	53,815
Cumulative dividends on Series A convertible preferred stock		(1,143)	(3,430)
Net (loss) income attributable to common stockholders	$ (92,273)	$ (47,427)	$ 50,385
Basic and diluted
Continuing operations (in dollars per share)	$ (2.90)	$ (2.72)	$ (16.60)
Discontinued operations (in dollars per share)			$ 47.99
Net (loss) income per share, basic and diluted (in dollars per share)	$ (2.90)	$ (2.72)	$ 31.39
Weighted-average number of common shares:
Basic and diluted (in shares)	31,848,299	17,440,910	1,605,324