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Long-Term Debt (Detail) (USD $)
Jul. 31, 2013
Jan. 31, 2013
Debt Instrument [Line Items]    
Convertible Notes $ 2,163,171 $ 1,909,714
Less: Current Portion 0 0
Long Term Portion 2,163,171 1,909,714
10% Senior Subordinated Convertible Notes due January 31, 2016
   
Debt Instrument [Line Items]    
Convertible Notes 1,100,019 1,066,611
9% Senior Subordinated Convertible Notes due February 15, 2016
   
Debt Instrument [Line Items]    
Convertible Notes 913,152 693,103
8% Senior Subordinated Convertible Notes due February 1, 2015
   
Debt Instrument [Line Items]    
Convertible Notes $ 150,000 $ 150,000