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Label Element Value
April 2011 12% Convertible Notes  
Convertible Debt us-gaap_ConvertibleDebt $ 0
October and November 2009 10% Convertible Notes  
Convertible Debt us-gaap_ConvertibleDebt 0
September 2010 10 Percent Convertible Notes  
Convertible Debt us-gaap_ConvertibleDebt 0
September 2011 Convertible Notes  
Convertible Debt us-gaap_ConvertibleDebt $ 0