Consolidated Statements Of Stockholders' Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-In Capital [Member]	Unearned Compensation [Member]	Deficit Accumulated During The Development Stage [Member]	Total
Balance at Dec. 31, 2008	$ 161	$ 105,915	$ (313)	$ (70,452)	$ 35,311
Balance, shares at Dec. 31, 2008	161,305,390
Net loss				(13,755)	(13,755)
Common stock issued	11	4,349			4,360
Common stock issued, shares	11,558,645
Nonvested shares issued	2	285	34		321
Nonvested shares issued, shares	990,000
Nonvested shares withheld for taxes		(5)			(5)
Nonvested shares withheld for taxes, shares	(17,075)
Stock options issued		844			844
Warrants issued		594			594
Balance at Dec. 31, 2009	174	111,982	(279)	(84,207)	27,670
Balance, shares at Dec. 31, 2009	173,836,960
Net loss				(16,173)	(16,173)
Common stock issued	117	36,888			37,005
Common stock issued, shares	117,170,416
Nonvested shares issued		118	112		230
Nonvested shares issued, shares	251,667
Nonvested shares withheld for taxes		(70)			(70)
Nonvested shares withheld for taxes, shares	(156,115)
Stock options exercised		31			31
Stock options exercised, shares	100,000
Stock options issued		429			429
Balance at Dec. 31, 2010	291	149,378	(167)	(100,380)	49,122
Balance, shares at Dec. 31, 2010	291,202,928				291,202,928
Net loss				(21,245)	(21,245)
Common stock issued	35	16,696			16,731
Common stock issued, shares	34,880,599
Stock issued for note conversion, shares	14,315,789
Stock issued for note conversion	14	6,786			6,800
Nonvested shares issued	2	1,086	(625)		463
Nonvested shares issued, shares	1,753,134
Nonvested shares withheld for taxes		(28)			(28)
Nonvested shares withheld for taxes, shares	(49,232)
Stock options issued		399			399
Balance at Dec. 31, 2011	$ 342	$ 174,317	$ (792)	$ (121,625)	$ 52,242
Balance, shares at Dec. 31, 2011	342,103,218				342,103,218