Derivative Liabilities - Derivative warrant liability (Details) - USD ($)	9 Months Ended
	Apr. 30, 2017	Jul. 31, 2016
Notes to Financial Statements
Balance - Derivative warrant liability Value		$ 2,048,846
Forfeited or expired, value	$ (240,906)
Forfeited or expired, no. of warrants	(65,896)
Warrants exercised, value	$ (1,532,336)
Warrants exercised	(317,982)
Increase (Decrease) in fair value of derivative warrant liability	$ (275,604)
No. of Warrants - Derivative warrant liability		383,878