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Stockholders' Equity (Details) (Restricted Stock [Member], USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2009
Restricted Stock [Member]
     
Summary of restricted stock unit activity      
Number of units outstanding, beginning of year 1,096 50 50
Weighted Average Grant-Date Fair Value, beginning of year $ 4.76 $ 4.24 $ 4.24
Granted, Number of Units 713,148 1,046  
Granted, Weighted Average Grant-Date Fair Value $ 5.40 $ 4.78  
Released, Number of Units (97,007)    
Released, Weighted Average Grant-Date Fair Value $ 5.30    
Forfeited, Number of Units (35,025)    
Forfeited, Weighted Average Grant-Date Fair Value $ 5.29    
Number of units outstanding, end of year 582,212 1,096 50
Weighted Average Grant-Date Fair Value, end of year $ 5.42 $ 4.76 $ 4.24
Aggregate Intrinsic Value at Year End $ 5,204,975