DERIVATIVE LIABILITY - Schedule of Derivative Liability (Details) - USD ($)	9 Months Ended	12 Months Ended
	Apr. 30, 2022	Jul. 31, 2021	Jul. 31, 2020
Derivative [Line Items]
Number of warrants accounted for as derivative liability, Expiry	(488,438)	(5,787,286)	(1,402,393)
Warrant derivative [Member]
Derivative [Line Items]
Warrant derivative, Beginning Balance	$ 441,766	$ 2,218,107
Number of warrants accounted for as derivative liability, Beginning Balance	5,480,083	11,159,919
Warrant derivative, Expiry	$ 0	$ 0
Number of warrants accounted for as derivative liability, Expiry	(488,438)	(5,679,836)
Warrant derivative, Fair value adjustment	$ (252,324)	$ (1,776,341)
Warrant derivative, Ending Balance	$ 189,442	$ 441,766	$ 2,218,107
Number of warrants accounted for as derivative liability, Ending Balance	4,991,645	5,480,083	11,159,919