Income Taxes - Deferred income taxes (Details) - USD ($)	Jul. 31, 2020	Jul. 31, 2019
Income Tax Disclosure [Abstract]
Net operating loss carryforwards	$ 67,782,365	$ 64,308,679
Accrued Expenses	2,398,682	1,090,537
Other temporary differences	1,054,768	721,653
Intangible assets	1,793,382	2,173,419
Total Deferred Tax Assets	73,029,197	68,294,288
Valuation Allowance	(73,029,197)	(68,294,288)
Total Deferred Tax Liabilities	0	0
Net Deferred Income Taxes	$ 0	$ 0