Common stock options granted, forfeited or expired and exercised - Stock-Based Compensation (Details 1) - $ / shares	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Options Outstanding	29,701,197
Options Granted		8,879,499
Options Forfeited or expired	(1,315,000)	(90,000)
Options Exercised	(6,416,316)	(526,306)
Options Outstanding	37,964,390	29,701,197
Weighted Average Exercise Price per Share	$ 0.09	$ .46
Weighted Average Exercise Price per Share, Granted	.001	0.001
Weighted Average Exercise Price per Share, Forfeited or expired	.75	0.53
Weighted Average Exercise Price per Share, Exercised	.001	0.001
Weighted Average Exercise Price per Share, Outstanding	$ 0.06	$ 0.09