Statements of Operations and Comprehensive Loss (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Income Statement [Abstract]
Research and development	$ 63,139	$ 565,764	$ 846,366	$ 608,383
General and administrative expense	2,803,397	2,088,556	5,425,523	3,204,997
In-process research and development	0	9,440,000	0	9,440,000
Loss from operations	(2,866,536)	(12,094,320)	(6,271,889)	(13,253,380)
Interest expense	(232,686)	(357,370)	(658,395)	(779,124)
Other income, net	(49)	50,000	492,026	50,000
Net loss and comprehensive loss	$ (3,099,271)	$ (12,401,690)	$ (6,438,258)	$ (13,982,504)
Basic net loss per share	$ (0.04)	$ (0.13)	$ (0.07)	$ (0.15)
Diluted net loss per share	$ (0.04)	$ (0.13)	$ (0.07)	$ (0.15)
Shares used for basic net loss per share	83,948,500	93,382,540	88,843,353	93,135,527
Shares used for diluted net loss per share	83,948,500	93,382,540	88,843,353	93,135,527