Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity Warrants (Details)

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Stockholders' Equity Warrants (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2014
Dec. 31, 2013
Sep. 30, 2013
Apr. 02, 2013
Sep. 30, 2014
Dec. 31, 2013
Sep. 30, 2013
Dec. 31, 2013
Mar. 31, 2013
Dec. 19, 2012
Class of Warrant or Right [Line Items]                    
Stock Issued During Period, Shares, Dividend Reinvestment Plan 15,268   12,085   38,742   53,749      
Stock Issued During Period, Value, Dividend Reinvestment Plan $ 159   $ 120   $ 399   $ 628      
Equity Securities, Shares                   17,824,647
Warrants Exercised During Period       (8,720,690)   (1,130,460)        
Class of Warrant or Right, Exercise Price of Warrants or Rights       $ 10.25         $ 11.00  
Stock Issued During Period, Shares, Conversion of Convertible Securities       8,720,690   1,212,607        
Issuance of common stock in connection with exercise of warrants             $ 102,276 $ 107,514    
Cashless Warrants Exercised During Period               (100,000)    
Stock Issued During Period, Shares, Cashless Exercise of Warrants, Forfeited               (93,649)    
Stock Issued During Period, Shares, Cashless Exercise of Warrant               6,351    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights       1.0727            
Warrants Expired During Period   3,580,279