Information on stock options outstanding - Stock-Based Compensation (Details 3) - USD ($)	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Options Outstanding		37,964,390	29,701,197
Weighted Average Exercise Price per Share		$ 0.06	$ 0.09	$ .46
Options Weighted Average Remaining Life (Years)	7 months 9 days
Options Aggregate Intrinsic Value	$ 271,746
Exercise Price 0.001
Options Range of Exercise Price	$ .001
Options Range of Exercise Price	$ .001
Options Outstanding	26,383,074
Weighted Average Exercise Price per Share	$ .001
Options Weighted Average Remaining Life (Years)	2 years 8 months 27 days
Exercise Price 0.19 to 0.38
Options Range of Exercise Price	$ .19
Options Range of Exercise Price	$ .38
Options Outstanding	3,000,000
Weighted Average Exercise Price per Share	$ 0.282
Options Weighted Average Remaining Life (Years)	7 months 24 days
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)	2 months 26 days