Loss Per Share (Details)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Stock Options [Member]
Class of Stock [Line Items]
Dilutive Securities Excluded From Computation Of Earnings Per Share, Shares	21,984,596	19,086,328
Warrants [Member]
Class of Stock [Line Items]
Dilutive Securities Excluded From Computation Of Earnings Per Share, Shares	58,287,955	25,007,979
Series E Preferred Stock [Member]
Class of Stock [Line Items]
Dilutive Securities Excluded From Computation Of Earnings Per Share, Shares	3,368,117	4,599,136
Restricted Stock [Member]
Class of Stock [Line Items]
Dilutive Securities Excluded From Computation Of Earnings Per Share, Shares	142,500	340,000