Securities Purchase Agreement (Details 3) (Series C-2 Warrants [Member], USD $)	Jun. 30, 2012	Dec. 31, 2011
Series C-2 Warrants [Member]
Series C2 warrants using binomial option pricing
Closing price per share of common stock	$ 0.06	$ 0.27
Conversion price per share	$ 0.05	$ 0.60
Volatility	87.50%	88.00%
Risk-free interest rate	0.64%	0.83%
Credit spread	20.40%	20.90%
Remaining expected lives of underlying securities (years)	4 years 6 months	5 years
Time to exercise (months)	18 months	24 months