Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Consolidated Statements of Operations
Revenues	$ 147	$ 208
Costs and expenses
Research and development	4,522	5,358
Selling, general and administrative	13,533	2,728
Total costs and expenses	18,055	8,086
Operating loss	(17,908)	(7,878)
Other income (expense):
Interest income	52	19
Interest expense	(727)	(962)
Other income (expense)	169	(456)
Total other income (expense)	(506)	(1,399)
Net loss	(18,414)	(9,277)
Cumulative dividends on Series A convertible preferred stock		(858)
Net loss attributable to common stockholders	$ (18,414)	$ (10,135)
Loss per common share:
Basic and diluted (in dollars per share)	$ (0.60)	$ (6.05)
Weighted-average number of common shares:
Basic and diluted (in shares)	30,875,424	1,676,442