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Fair Value Assumptions Used in Accounting for Derivative Additional Investment Rights Liability - Derivative Liabilities (Details 2) - $ / shares
12 Months Ended
Jul. 31, 2016
Jul. 31, 2015
Current exercise price of warrants $ 0.015 $ 0.015
Time to expiration 2 years 1 month 2 years 6 months
Risk-free interest rate 0.76% 1.08%
Estimated volatility 101.00% 82.00%
Dividend 0.00% 0.00%
Stock price $ .001 $ 0.010
Additional Investment Rights    
Underlying number of units of convertible preferred stock 500 500
Underlying number of warrants 33,333,333 33,333,333
Current exercise price of warrants $ 0.015 $ 0.015
Current conversion price of preferred stock $ 0.015 $ 0.015
Time to expiration 18 days 1 year 18 days
Risk-free interest rate 0.38% 0.30%
Estimated volatility 13.00% 79.00%
Dividend 0.00% 0.00%
Stock price $ 0.008 $ 0.010