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Note 16 - Income Taxes (Details Textual) $ in Millions	12 Months Ended
	Jul. 31, 2021 USD ($)	Jul. 31, 2020 USD ($)	Jul. 31, 2021 CAD ($)
Interest Expense Carryforward	$ 4,900,000
Current Tax Expense (Benefit)	0
Deferred Tax Expense (Benefit)	$ (4,008)	$ (5,551)
Percentage of Valuation Allowance Recorded from Income Taxes	100.00%
UNITED STATES
Operating Loss Carryforwards With Indefinite Life	$ 51,300,000
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards, Total	$ 173,000,000		$ 4.9

X

- Definition

Amount of current tax expense (benefit) pertaining to income (loss) from continuing operations.

+ References

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- Definition

Amount of deferred tax expense (benefit) pertaining to income (loss) from continuing operations.

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- Definition

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+ References

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- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws, with and indefinite life.

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The percentage of valuation allowance recorded from current and prior tax years.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319

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