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Redeemable Preferred Stock and Warrants (Tables)
6 Months Ended
Jun. 30, 2012
Redeemable Preferred Stock and Warrants [Abstract]  
Changes in temporary equity
                                         
    Carrying Value of
Series A Preferred
Stock
    Number of
Outstanding
Series A
Preferred Shares
    Liquidation Value of
Series A Preferred
Stock
    Number of
Outstanding
Warrants
    Weighted Average
Exercise Price of
Warrants
 

December 31, 2011

  $ 56,736       6,000     $ 69,759       21,566,245     $ 3.23  

Accrued dividends

    2,755       —         4,248       2,056,854       2.07  

Accretion

    972       —         —         —         —    
   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

 

June 30, 2012

  $ 60,463       6,000     $ 74,007       23,623,099     $ 3.13