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Stockholders' Equity (Details 3)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2010
Preferred stock
    
Conversion of Convertible Preferred Stock    
Preferred shares exchanged (in shares) 877,869  
Common stock
    
Common shares issued:    
At stated convertible option (in shares) 53,366  
Incremental shares issued under the exchange transaction (in shares) 1,631,105  
Total common shares issued (in shares) 1,684,471 236,514