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Note 16 - Income Taxes - Components of Income Tax Provision (Details) - USD ($)	12 Months Ended
	Jul. 31, 2021	Jul. 31, 2020
Loss before income taxes	$ (14,817,818)	$ (14,616,067)
Corporate tax rate	21.83%	21.72%
Expected tax recovery	$ (3,234,730)	$ (3,174,610)
Foreign tax rate differences	77,454	85,796
Permanent differences	(217,615)	170,023
Prior year true-up	(270,078)	117,800
Change in state tax rate	(405,826)	(553,365)
Foreign exchange rate differences	(55,666)	17,456
Other	162,812	71,805
Change in valuation allowance	3,939,641	3,233,427
Tax adjustment from operations	(4,008)	(31,668)
Unrealized loss, other comprehensive loss		26,117
Deferred tax benefits	$ (4,008)	$ (5,551)

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