Note 15 - Income Taxes (Details Textual) $ in Millions	7 Months Ended	12 Months Ended
	Jul. 31, 2018	Jul. 31, 2020 USD ($)	Jul. 31, 2019 USD ($)	Jul. 31, 2018 USD ($)	Jul. 31, 2020 CAD ($)
Interest Expense Carryforward		$ 3,400,000
Current Income Tax Expense (Benefit), Total		0
Deferred Income Tax Expense (Benefit), Total		(5,551)	$ (14,372)	$ (707,511)
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Amount				$ (232,843)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	21.00%	26.87%
Effective Income Tax Rate Reconciliation, Recognition of Deferred Tax Assets to Offset Deferred Tax Liability, Amount				$ (430,121)
Percentage of Valuation Allowance Recorded from Income Taxes		100.00%
UNITED STATES
Operating Loss Carryforwards With Indefinite Life		$ 37,300,000
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards, Total		$ 167,300,000
Foreign Tax Authority [Member] | Canada Revenue Agency [Member]
Operating Loss Carryforwards, Total					$ 5.1