Income Taxes (Details Narrative) - USD ($)	3 Months Ended	12 Months Ended
	Oct. 31, 2020	Jul. 31, 2019
Pre-tax gain or (loss) arising from domestic operations	$ (10,982,942)	$ (34,291,142)
Pre-tax (losses) arising from foreign operations	(6,134)	$ 59,049
NOL carryforwards	219,700,000
Decrease in deferred tax assets	73,000,000
Generex Pharmaceuticals
NOL carryforwards	34,400,000
NGIO
NOL carryforwards	35,700,000
Regentys
NOL carryforwards	6,600,000
Olaregen
NOL carryforwards	4,100,000
Veneto
NOL carryforwards	$ 10,600,000