Note 22 - Income Taxes (Details Textual) - 12 months ended Jul. 31, 2023 $ in Thousands, $ in Millions	USD ($)	CAD ($)
Percentage of Valuation Allowance Recorded from Income Taxes	100.00%
Foreign Tax Authority [Member] | Canada Revenue Agency [Member]
Operating Loss Carryforwards, Subject to Expiration	$ 45,948	$ 26
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Interest Expense Carryforwards, Not Subject to Expiration	$ 27,000