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Stockholders' Equity (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Restricted stock unit activity        
Granted, Number of Units 0   0  
Granted, Weighted Average Grant-Date Fair Value   $ 1.97   $ 2.16
Vested, Number of Units         
Restricted Stock Units [Member]
       
Restricted stock unit activity        
Balance at December 31, 2011, number of Units     1,096  
Balance at December 31,2011 Weighted Average Grant-Date Fair Value     4.76  
Granted, Number of Units     637,148  
Granted, Weighted Average Grant-Date Fair Value     5.29  
Vested, Weighted Average Grant-Date Fair Value         
Forfeited, Number of Units     (19,025)  
Forfeited, Weighted Average Grant-Date Fair Value     4.79  
Balance at September 30, 2012, Number of Units 619,219   619,219  
Balance at September 30, 2012, Weighted Average Grant-Date Fair Value 5.29   5.29  
Aggregate Intrinsic Value 3,740,083   3,740,083