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
Mar. 31, 2014
Dec. 31, 2013
Mar. 31, 2013
Apr. 02, 2013
Dec. 31, 2013
Dec. 31, 2013
Dec. 19, 2012
Class of Warrant or Right [Line Items]              
Stock Issued During Period, Shares, Dividend Reinvestment Plan 10,780   25,457        
Stock Issued During Period, Value, Dividend Reinvestment Plan $ 110   $ 324        
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     11.00 10.25      
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     $ 63,771     $ 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