Income Taxes (Details Narrative) - USD ($)	6 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
Pre-tax gain or (loss) arising from domestic operations	$ (16,671,769)	$ (11,006,793)
Pre-tax (losses) arising from foreign operations	(20,011)	$ (326,461)
Decrease in deferred tax assets	70,000,000
Generex Pharmaceuticals
NOL carryforwards	220,000,000
Antigen Express
NOL carryforwards	36,200,000
Regentys
NOL carryforwards	6,300,000
Olaregen
NOL carryforwards	$ 1,700,000