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Black-Scholes Option Pricing model (Details) (USD $) | 6 Months Ended | 12 Months Ended
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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

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