Loss Per Share (Details) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common shares potentially issuable	29,217	19,798
Options, Warrants And Stock-Based Compensation [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common shares potentially issuable	9,055	3,915
Convertible Debt Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common shares potentially issuable	15,933	11,654
Convertible Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common shares potentially issuable	4,229	4,229