Derivative Liabilities - Fair value assumptions, derivative additional investment rights liability (Details)		3 Months Ended
	Aug. 02, 2015	Oct. 31, 2016 $ / shares shares	Jul. 31, 2016 $ / shares
Notes to Financial Statements
Underlying number of units of convertible preferred stock | shares		500
Underlying number of units of warrants | shares		33,333,333
Current exercise price of warrants		$ 0.015	$ 0.015
Current conversion price of preferred stock		$ 0.015
Time to expiration		0 months
Risk-free interest rate		0.0038
Estimated volatility		0.13
Dividend
Stock price at period end date		$ 0.008	$ 0.01