Acquisitions - Purchase price as of the Olaregen acquisition (Details) - USD ($)	Jan. 31, 2019	Jan. 07, 2019	Nov. 27, 2018	Nov. 02, 2018	Oct. 03, 2018	Jul. 31, 2018	Jan. 31, 2018	Dec. 28, 2017	Jul. 31, 2017	Jan. 18, 2017
Cash and cash equivalents	$ 2,373,821					$ 1,046,365	$ 2,048,067		$ 2,879,165
Inventory	1,099,508					12,075
Other current assets	286,439					96,251
Net Tangible Assets	73,069,456					6,606,854
Non-controlling interest	21,683,698					$ (5,576,272)
Goodwill								$ 0		$ 13,400,000
Total
Cash and cash equivalents	2,410,150
Prepaid expenses	95,804
Inventory	1,068,856
Notes receivable	1,387,763
Total assets acquired	15,735,905
Goodwill	25,177,930
Final Allocation
Goodwill	$ 0
Regentys
Cash and cash equivalents		$ 61,857
Other current assets		13,138
Net Tangible Assets		1,761,996
Notes receivable		14,345,205
In-process research & development		3,510,680
Deferred tax liability		(889,782)
Non-controlling interest		(9,870,762)
Non-controlling interest		(4,073,898)
Cash paid prior to the time of closing		400,000
Note receivable from Generex		14,345,205
Goodwill		$ 13,485,758
Olaregen
Cash and cash equivalents			$ 608,419
Prepaid expenses			20,488
Inventory			408,501
Other current assets			37,950
Accounts payable			(216,670)
Accrued liabilities			(216,694)
Net Tangible Assets			641,994
Notes receivable			11,472,663
In-process research & development			3,980,000
Non-compete agreement			790,000
Deferred tax liability			(1,040,173)
Non-controlling interest			(11,999,559)
Total assets acquired			3,844,925
Non-controlling interest			0
Cash paid prior to the time of closing			400,000
Note receivable from Generex			11,472,663
Goodwill			$ 8,027,738
"Veneto Second Closing"
Cash and cash equivalents
Prepaid expenses
Inventory
Notes receivable
Total assets acquired				7,110,000
Goodwill				$ 16,293,948
"Veneto First Closing"
Cash and cash equivalents					$ 2,410,150
Prepaid expenses					95,804
Inventory					1,068,856
Notes receivable					1,387,763
Total assets acquired					8,625,905
Goodwill					$ 8,883,982