Information on stock options outstanding - Stock-Based Compensation (Details 3) - USD ($)	12 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014
Options Outstanding	19,639,477	19,639,477	37,964,390
Weighted Average Exercise Price per Share	$ 0.029	$ .029	$ .06
Options Weighted Average Remaining Life (Years)	2 years 9 months
Options Aggregate Intrinsic Value	$ 129,647
Exercise Price 0.001
Options Range of Exercise Price	$ .001
Options Range of Exercise Price	$ .001
Options Outstanding	18,789,477
Weighted Average Exercise Price per Share	$ .001
Options Weighted Average Remaining Life (Years)	2 years 9 months
Exercise Price 0.64
Options Range of Exercise Price	$ 0.64
Options Range of Exercise Price	$ 0.64
Options Outstanding	850,000
Weighted Average Exercise Price per Share	$ 0.64
Options Weighted Average Remaining Life (Years)	3 years 7 months