Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended		147 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012
Operating expenses:
Research and development	$ 1,409	$ 655	$ 3,525	$ 2,690	$ 26,608
General and administrative	1,487	1,378	3,992	4,347	45,656
Total operating expenses	2,896	2,033	7,517	7,037	72,264
Total operating loss	(2,896)	(2,033)	(7,517)	(7,037)	(72,264)
Other income (expense):
Interest income	7	5	18	14	812
Interest expense					(4,451)
Change in fair value of convertible debt instrument					(3,426)
Change in fair value of warrant liabilities				(524)	9,022
Other income	200		200		691
Total other income (expense)	207	5	218	(510)	2,648
Net loss	(2,689)	(2,028)	(7,299)	(7,547)	(69,616)
Preferred stock dividends	(238)	(253)	(702)	(1,275)	(3,961)
Preferred stock accretion	(58)	(58)	(172)	(173)	(3,987)
Net loss applicable to common stockholders	$ (2,985)	$ (2,339)	$ (8,173)	$ (8,995)	$ (77,564)
Net loss per common share - basic and diluted	$ (0.19)	$ (0.19)	$ (0.55)	$ (0.77)
Weighted average common shares outstanding - basic and diluted	15,822	12,353	14,851	11,697