Warrants (Details) - $ / shares	12 Months Ended
	Jul. 31, 2021	Jul. 31, 2020
Warrants
Number of warrants, outstanding	500,000	2,365,000
Number of warrants, granted	1,911,330	0
Number of warrants, expired	(500,000)	(1,865,000)
Number of warrants, exercised	0	0
Number of warrants, exercisable	1,911,330	500,000
Weighted average exercise price, outstanding	$ .15	$ .15
Weighted average exercise price, granted	.08	.00
Weighted average exercise price, expired	.15	.15
Weighted average exercise price, exercised	.00	.00
Weighted average exercise price, exercisable	$ .15	$ .15
Weighted average remaining contract term, outstanding	2 years	7 months 24 days
Weighted average remaining contract term, exercisable	2 years	3 months 7 days