Note 22 - Income Taxes - Net Operating Loss Carry-forwards Expirations (Details) - Jul. 31, 2023 $ in Thousands, $ in Thousands	USD ($)	CAD ($)
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
No expiry	$ 90,364
Operating Loss Carryforwards	290,524
Foreign Tax Authority [Member] | Canada Revenue Agency [Member]
Net Operating Loss Carry-forwards Subject to Expiration	45,948	$ 26,000
Tax Year 2024 [Member] | Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Net Operating Loss Carry-forwards Subject to Expiration	2,519
Tax Year 2027 [Member] | Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Net Operating Loss Carry-forwards Subject to Expiration	6,907
Tax Year 2027 [Member] | Foreign Tax Authority [Member] | Canada Revenue Agency [Member]
Net Operating Loss Carry-forwards Subject to Expiration		183
Tax Year 2025 [Member] | Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Net Operating Loss Carry-forwards Subject to Expiration	4,831
Tax Year 2028 [Member] | Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Net Operating Loss Carry-forwards Subject to Expiration	11,777
Tax Year 2028 [Member] | Foreign Tax Authority [Member] | Canada Revenue Agency [Member]
Net Operating Loss Carry-forwards Subject to Expiration		$ 2,089
Tax Year 2026 [Member] | Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Net Operating Loss Carry-forwards Subject to Expiration	8,461
Tax Year 2029 [Member] | Foreign Tax Authority [Member] | Canada Revenue Agency [Member]
Net Operating Loss Carry-forwards Subject to Expiration	3,436
Tax Year 2030 [Member] | Foreign Tax Authority [Member] | Canada Revenue Agency [Member]
Net Operating Loss Carry-forwards Subject to Expiration	2,406
Tax Year 2031 [Member] | Foreign Tax Authority [Member] | Canada Revenue Agency [Member]
Net Operating Loss Carry-forwards Subject to Expiration	2,673
Tax Years 2009 to 2037 [Member] | Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Net Operating Loss Carry-forwards Subject to Expiration	165,665
Remaining [Member] | Foreign Tax Authority [Member] | Canada Revenue Agency [Member]
Net Operating Loss Carry-forwards Subject to Expiration	$ 35,161