Summary of Significant Accounting Policies (Details 3) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Numerator:
Net income (loss) available to common shareholders	$ 3,573	$ (60)	$ 3,588	$ 28,977
Effect of dilutive securities
Hybrid financial instruments	(628)	(433)	(1,173)	24,054
Derivative liability - warrants	207	258	580	3,424
Derivative liability - Series C and D preferred stock and debentures	107	55	244	1,998
Denominator:
Weighted average shares used to compute basic income (loss) per common share (in shares)	359,568,430	270,512,776	351,339,588	215,354,974
Effect of dilutive securities:
Hybrid financial instruments (in shares)			32,949,714		15,619,639,000
Denominator for diluted income (loss) per common share (in shares)	398,000,130	308,944,476	389,771,288	253,786,674
Basic income (loss) per common share (in dollars per share)	$ 0.01	$ 0.00	$ 0.70	$ 0.14
Diluted income (loss) per common share (in dollars per share)	$ 0.009	$ 0.00	$ 0.63	$ 0.11
Numerator [Member]
Numerator:
Net income (loss) available to common shareholders	3,573	(60)	3,588	28,977
Effect of dilutive securities
Hybrid financial instruments	0	(433)	(29,151)	(24,054)
Derivative liability - warrants	0	258	(40)	(3,424)
Derivative liability - Series C and D preferred stock and debentures	0	55	(1,992)	(2,149)
Numerator for diluted income (loss) per common share	$ 3,573	$ (180)	$ (27,595)	$ (650)
Denominator [Member]
Denominator:
Weighted average shares used to compute basic income (loss) per common share (in shares)	359,568,430	270,512,776	351,339,588	215,354,974
Effect of dilutive securities:
Hybrid financial instruments (in shares)	32,949,714	32,949,714	32,949,714	32,949,714
Derivative liability - warrants (in shares)	2,083,292	2,083,292	2,083,292	2,083,292
Derivative liability - Series C and D preferred stock and debentures (in shares)	3,398,694	3,398,694	3,398,694	3,398,694
Denominator for diluted income (loss) per common share (in shares)	398,000,130	308,944,476	389,771,288	253,786,674
Basic income (loss) per common share (in dollars per share)	$ 0.010	$ 0.00	$ 0.01	$ 0.14
Diluted income (loss) per common share (in dollars per share)	$ 0.009	$ 0.00	$ 0.09	$ 0.11