Acquisitions - Purchase price as of the Olaregen acquisition (Details) - USD ($)	Apr. 30, 2019	Jan. 07, 2019	Nov. 27, 2018	Nov. 02, 2018	Oct. 03, 2018	Jul. 31, 2018	Apr. 30, 2018	Dec. 28, 2017	Jul. 31, 2017	Jan. 18, 2017
Cash and cash equivalents	$ 1,407,837					$ 1,046,365	$ 1,567,433		$ 2,879,165
Inventory	250,021					12,075
Other current assets	218,819					$ 96,251
Goodwill								$ 0		$ 13,400,000
Total
Cash and cash equivalents	2,410,150
Prepaid expenses	95,804
Inventory	1,068,856
Total Fair Value of Assets Acquired	9,822,070
Goodwill	25,177,930
"Veneto Second Closing"
Cash and cash equivalents
Prepaid expenses
Inventory
Total Fair Value of Assets Acquired	(1,126,948)			3,706,052
Goodwill				16,293,948
Final Allocation
Goodwill	0
Total1Member
Cash and cash equivalents	2,410,150
Prepaid expenses	95,804
Inventory	1,068,856
Total Fair Value of Assets Acquired	4,989,069
Goodwill	13,585,769
"Veneto First Closing"
Cash and cash equivalents	2,410,150				$ 2,410,150
Prepaid expenses	95,804				95,804
Inventory	1,068,856				1,068,856
Total Fair Value of Assets Acquired	$ 6,116,017				6,116,018
Goodwill					$ 8,883,982
Regentys
Cash and cash equivalents		$ 61,857
Other current assets		13,138
In-process research & development		3,510,680
Deferred tax liability		(889,782)
Total Fair Value of Assets Acquired		859,447
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)
In-process research & development			3,980,000
Non-compete agreement			790,000
Deferred tax liability			(1,040,173)
Total Fair Value of Assets Acquired			3,844,925
Cash paid prior to the time of closing			400,000
Note receivable from Generex			11,472,663
Goodwill			$ 8,027,738
Veneto Holdings, L.L.C.
Goodwill				$ 13,538,629