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Closing Stock Price at Transaction Date and Inputs to Black-Scholes Option Pricing (Detail) (Warrants)
9 Months Ended
Oct. 31, 2013
Warrants
 
Schedule Of Class Of Right Or Warrant Fair Value Assumption [Line Items]  
Exercise Price 0.42
Expected Term (in years) 5 years
Volatility 48.00%
Dividend rate 0.00%
Interest rate 0.70%