Business, Liquidity and Summary of Significant Accounting Policies (Details 2) (Fair Value Liability For Price Adjustable Warrants, Level 3, Fair Value of warrants issued in Amendment 5, USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Fair Value Liability For Price Adjustable Warrants | Level 3 | Fair Value of warrants issued in Amendment 5
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 4,169
Fair value of warrants issued in Notes and Warrants Purchase Agreement	342
Change in fair value included in statement of operations	(2,042)
Ending balance	$ 2,469
Exercise Price [Roll Forward]
Beginning balance	$ 0.28
Fair value of warrants issued in Notes and Warrants Purchase Agreement, exercise price	$ 0.28
Ending balance	$ 0.28
Stock Price [Roll Forward]
Beginning balance	$ 0.46
Fair value of warrants issued in Notes and Warrants Purchase Agreement, stock price	$ 0.37
Ending balance	$ 0.25
Volatility [Roll Forward]
Beginning balance	146.00%
Fair value of warrants issued in Notes and Warrants Purchase Agreement, volatility	142.00%
Ending balance	140.00%
Contractual Life In Years [Roll Forward]
Contractual Life (In Years)	4 years 7 months 21 days
Fair value of warrants issued, term	5 years 6 months
Fair value of exercised warrants, exercised term	4 years 7 months 24 days
Risk Free [Roll Forward]
Beginning balance	0.66%
Fair value of warrants issued in Notes and Warrants Purchase Agreement, risk free rate	1.09%
Ending balance	0.65%