Warrants (Details) - $ / shares	12 Months Ended
	Jul. 31, 2020	Jul. 31, 2019
Warrants
Number of warrants, outstanding	2,365,000	2,015,000
Number of warrants, granted	0	500,000
Number of warrants, expired	(1,865,000)	(150,000)
Number of warrants, exercised	0	0
Number of warrants, exercisable	500,000	2,365,000
Weighted average exercise price, outstanding	$ 0.15	$ 0.15
Weighted average exercise price, granted	.00	0.15
Weighted average exercise price, expired	0.15	0.15
Weighted average exercise price, exercised	.00	0.00
Weighted average exercise price, exercisable	$ 0.15	$ 0.15
Weighted average remaining contract term, outstanding	7 months 24 days	1 year 5 months 19 days
Weighted average remaining contract term, granted		1 year 3 months 11 days
Weighted average remaining contract term, exercisable	3 months 7 days	7 months 24 days