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Stockholders' Equity (Details 2) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended 185 Months Ended 194 Months Ended
Dec. 31, 2010
Dec. 31, 2011
Sep. 30, 2012
Common shares issued:      
Deemed dividends recorded $ 3,515 $ 3,515 $ 3,515
Preferred stock
      
Conversion of Convertible Preferred Stock      
Preferred shares exchanged (in shares) 833,671 1,776,858 1,776,858
Common shares issued:      
Deemed dividends recorded $ 3,500    
Common stock
      
Common shares issued:      
At stated convertible option (in shares) 50,679    
Incremental shares issued under the exchange transaction (in shares) 185,835    
Total common shares issued (in shares) 236,514