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Closing Stock Price at Transaction Date and Inputs to Black-Scholes Option Pricing (Detail) (USD $)
3 Months Ended 12 Months Ended 12 Months Ended
Oct. 31, 2013
Jul. 31, 2013
Apr. 30, 2013
Jan. 31, 2014
Oct. 29, 2012
Jan. 31, 2012
Jan. 31, 2014
Warrants
Jan. 31, 2014
Placement Agent Warrants [Member]
Jan. 31, 2013
Placement Agent Warrants [Member]
Jan. 31, 2014
Note Warrant [Member]
Jan. 31, 2013
Note Warrant [Member]
Schedule Of Class Of Right Or Warrant Fair Value Assumption [Line Items]                      
Fair value of 9% Notes warrants               $ 54,468   $ 186,897  
Exercise Price       0.125 0.11485 0.11485 0.42 0.40 0.40 0.45 0.45
Expected Term (in years) 6 years 3 years 4 years 7 months 2 days       5 years 5 years   5 years  
Volatility 67.20% 29.70% 26.00%       48.00% 36.70%   36.70%  
Dividend rate 0.00% 0.00% 0.00%       0.00% 0.00%   0.00%  
Interest rate 1.40% 0.60% 0.50%       0.70% 0.70%   0.70%