Consolidated Statements of Changes in Stockholders' Equity and Comprehensive Loss (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]	Total
Balance at Dec. 31, 2008	$ 79	$ 208,874		$ (197,409)	$ 11,544
Balance, Common Stock Shares at Dec. 31, 2008	78,750,995
Stock issued for Warrants exercised, Common Stock Shares	5,589,790
Stock issued for Warrants exercised	6	6,133			6,139
Stock issued for Options exercised, Common Stock Shares	293,831
Stock issued for Options exercised		130			130
Stock issued for Private placement, net of issuance costs, Common Stock Shares	45,591,304
Stock issued for Private placement, net of issuance costs	46	55,524			55,570
Stock issued for settlement of accounts payable, Common Stock Shares	1,925,408
Stock issued for settlement of accounts payable and accrued expenses	2	1,365			1,367
Stock-based compensation, Common Stock Shares	636,119
Stock-based compensation		826			826
Standby Finance- finance costs		241			241
Redeemable warrants valuation adjustment		(9,942)			(9,942)
Net comprehensive loss				(7,180)	(7,180)
Balance at Dec. 31, 2009	133	263,151		(204,589)	58,695
Balance, Common Stock Shares at Dec. 31, 2009	132,787,447
Stock issued for settlement of accounts payable, Common Stock Shares	498,867
Stock issued for settlement of accounts payable and accrued expenses		329			329
Shares sold at the market, Common Stock Shares	520,000
Shares sold at the market		292			292
Stock-based compensation, Common Stock Shares	1,435,295
Stock-based compensation	2	739			741
Standby Finance- finance costs					0
Net comprehensive loss			(974)	(13,136)	(14,110)
Balance at Dec. 31, 2010	135	264,511	(974)	(217,725)	45,947
Balance, Common Stock Shares at Dec. 31, 2010	135,241,609
Stock issued for settlement of accounts payable, Common Stock Shares	145,440
Stock issued for settlement of accounts payable and accrued expenses		71			71
Stock-based compensation, Common Stock Shares	255,254
Stock-based compensation	1	376			377
Standby Finance- finance costs					0
Net comprehensive loss			585	(9,015)	(8,430)
Balance at Dec. 31, 2011	$ 136	$ 264,958	$ (389)	$ (226,740)	$ 37,965
Balance, Common Stock Shares at Dec. 31, 2011	135,642,303