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Stockholders' Equity Detail on warrants issued (Details) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Class of Warrant or Right [Line Items]      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 3,211,707   18,395,963
Stock Issued During Period, Shares, New Issues 605,798 4,981,305  
Warrant [Member]
     
Class of Warrant or Right [Line Items]      
Class of Warrant or Right, Exercise Price of Warrants or Rights 1.39    
Warrants [Member]
     
Class of Warrant or Right [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate 53.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 2.60%    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 8.00    
Share Based Compensation Arrangement by Share Based Payment Award Grants in Period Weighted Average Grant Date Fair Value 0.72