Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Revenues
Development and milestone revenues	$ 208
Total revenues	208
Costs and expenses
Research and development	5,358	7,451
General and administrative	2,728	1,747
Total costs and expenses	8,086	9,198
Operating loss from continuing operations	(7,878)	(9,198)
Other income (expense):
Interest income	19	15
Interest expense	(962)	(360)
Other	(456)	(172)
Total other income (expense)	(1,399)	(517)
Loss from continuing operations	(9,277)	(9,715)
Discontinued Operations:
Loss from discontinued operations		(1,334)
Net loss	(9,277)	(11,049)
Cumulative dividends on Series A convertible preferred stock	(858)	(858)
Net loss attributable to common stockholders	$ (10,135)	$ (11,907)
Basic and Diluted
Continuing operations (in dollars per share)	$ (6.05)	$ (6.64)
Discontinued operations (in dollars per share)		$ (0.84)
Net loss (in dollars per share)	$ (6.05)	$ (7.48)
Weighted-average number of common shares:
Basic (in shares)	1,676,442	1,592,762
Diluted (in shares)	1,676,442	1,592,762