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Loss Per Share (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Stock Options [Member]
Class of Stock [Line Items]
Dilutive Securities Excluded From Computation Of Earnings Per Share, Shares	21,686,680	17,143,505
Warrants [Member]
Class of Stock [Line Items]
Dilutive Securities Excluded From Computation Of Earnings Per Share, Shares	55,287,611	37,389,825
Series E Preferred Stock [Member]
Class of Stock [Line Items]
Dilutive Securities Excluded From Computation Of Earnings Per Share, Shares	0	3,989,669
Restricted Stock [Member]
Class of Stock [Line Items]
Dilutive Securities Excluded From Computation Of Earnings Per Share, Shares	342,500	976,668

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