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Derivative Liabilities - Fair value assumptions, derivative warrant liability (Details) (USD $)
3 Months Ended 12 Months Ended
Oct. 31, 2013
Jul. 31, 2013
Notes to Financial Statements    
Current exercise price $ 0.03 $ 0.03
Time to expiration 3 years 2 months 12 days 3 years 6 months
Risk-free interest rate 0.57% 0.49%
Estimated volatility 81.00% 85.00%
Dividend   0.00%
Stock price at period end date $ 0.03 $ 0.035