Derivative Liabilities - Fair value assumptions, derivative additional investment rights liability (Details)		3 Months Ended
	Aug. 02, 2015 $ / shares shares	Oct. 31, 2015 $ / shares shares	Jul. 31, 2015 $ / shares
Notes to Financial Statements
Underlying number of units of convertible preferred stock | shares	500	500
Underlying number of units of warrants | shares	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	1 year	9 months
Risk-free interest rate	0.0030	0.0023
Estimated volatility	0.79	1.06
Dividend	0.00%	0.00%
Stock price at period end date		$ 0.0082	$ 0.01