Income Taxes (Details Narrative) - USD ($)	9 Months Ended	12 Months Ended
	Apr. 30, 2020	Jul. 31, 2019
Pre-tax gain or (loss) arising from domestic operations	$ (22,329,887)	$ (11,006,793)
Pre-tax (losses) arising from foreign operations	(23,507)	$ (326,461)
Decrease in deferred tax assets	72,000,000
Generex Pharmaceuticals
NOL carryforwards	227,500,000
Antigen Express
NOL carryforwards	36,200,000
Regentys
NOL carryforwards	6,300,000
Olaregen
NOL carryforwards	$ 4,000,000