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Quarterly Financial Data (unaudited)
12 Months Ended
Dec. 31, 2013
Quarterly Financial Data (unaudited) [Abstract]  
Quarterly Financial Data (unaudited)
16. Quarterly Financial Data (unaudited)
 
Summarized quarterly financial data for 2013 and 2012 is as follows (in thousands, except per share data):
   
Quarters Ended
 
   
March 31
  
June 30
  
September 30
  
December 31
 
   
(In thousands, except per share data)
 
2013
            
Total revenues
 $  $200  $  $100 
Net loss
  (6,864)  (3,423)  (9,980)  (27,218)
Net loss applicable to common stockholders
 $(6,864) $(3,423) $(9,980) $(27,218)
Basic and diluted loss per share applicable to common stock
 $(0.23) $(0.11) $(0.33) $(0.68)
                  
2012
                
Total revenues
 $  $  $  $100 
Net income (loss)
  (10,135)  (13,262)  1,584   3,849 
Net income (loss) applicable to common stockholders
 $(10,135) $(13,262) $1,584  $3,849 
Basic and diluted income (loss) per share applicable to common stock
 $(0.49) $(0.63) $0.07  $0.14 
 
Quarterly and year-to-date loss per share amounts are computed independently of each other. Therefore, the sum of the per share amounts for the quarters may not agree to the per share amounts for the year.