Income Taxes (Details Narrative) - USD ($)	12 Months Ended
	Jul. 31, 2019	Jul. 31, 2018
Pre-tax gain or (loss) arising from domestic operations	$ (11,006,793)	$ 35,948,698
Pre-tax (losses) arising from foreign operations	(326,461)	$ (150,394)
NOL carryforwards	196,200,000
Decrease in deferred tax assets	31,876,520
Generex Pharmaceuticals
NOL carryforwards	34,400,000
Antigen Express
NOL carryforwards	36,200,000
Regentys
NOL carryforwards	6,000,000
Olaregen
NOL carryforwards	$ 1,100,000