Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity Warrants (Details)

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Stockholders' Equity Warrants (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2013
Apr. 02, 2013
Dec. 31, 2013
Dec. 31, 2013
Mar. 31, 2013
Class of Warrant or Right [Line Items]          
Warrants Exercised During Period   8,720,690 1,130,460    
Stock Issued During Period, Shares, Conversion of Convertible Securities   8,720,690 1,212,607    
Class of Warrant or Right, Exercise Price of Warrants or Rights $ 10.25 $ 10.25 $ 10.25 $ 10.25 $ 11.00
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   1.0727      
Stock Issued During Period, Value, Conversion of Convertible Securities       $ 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  
Warrants Expired During Period 3,580,279