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Black-Scholes Option Pricing model (Details) (USD $)
 6 Months Ended 12 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Four-year termstock price $ 3.31  
Four-year term exercise price $ 2.60  
Four-year term volatility percent 132.0  
Four-year term percent risk free rate 0.82  
Three-year term stock price $ 3.45  
Three-year term exercise price $ 1.75  
Three-year term volatility percent 149.0  
Three-year term percent risk free rate 0.36  
Five-year termstock price Minimum   $ 0.50
Five-year termstock price Maximum   $ 1.00
Five-year term exercise price   $ 0.50
Five-year term volatility percent   190.0
Five-year term percent risk free rate Minimum   1.45
Five-year term percent risk free rate Maximum   2.00