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Senior Secured Note - Additional Information (Detail) (USD $)
3 Months Ended 6 Months Ended
Jul. 31, 2012
Jul. 31, 2011
Jul. 31, 2012
Jul. 31, 2011
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]        
Payment of financing cost, value     $ 25,661  
Interest expense 205,221 31,603 408,047 63,177
Senior Secured Notes
       
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]        
Debt, interest rate 8.929%   8.929%  
Debt, periodic principal payment     135,000  
Prepaid interest on notes principal     15,000  
Payment of financing cost, cash     5,000  
Payment of financing cost, shares     216,000  
Payment of financing cost, value     25,661  
Interest expense $ 5,000   $ 12,500