Percentage of taxable income for net operating loss carry forwards offset.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Tax year that remains open to examination under enacted tax laws, in YYYY format.

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

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Amount of unrecognized tax benefits.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset.

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Note 12 - Income Taxes and Deferred Income Taxes (Details Textual) - USD ($) $ in Thousands		12 Months Ended
	Dec. 22, 2017	May 31, 2026	May 31, 2025	May 31, 2024
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%	21.00%
SEC Schedule, 12-09, Valuation Allowances and Reserves, Period Increase (Decrease)		$ 28,432
Unrecognized Tax Benefits		0	$ 0	$ 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense		0	0	$ 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued			0
Current Period Earnings [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		37,627
Currency Translation Effects [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		19,429
Return to Provision and Other Prior Period Adjustments [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		28,740
Prior Year Impairment of Intangible Assets [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		29,602
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Period Increase (Decrease)			$ 179,090
Income Tax Jurisdiction, Domestic Federal [Member]
Operating Loss Carryforwards		$ 347,553
Net Operating Loss Carryforwards Offset, Percentage Of Taxable Income		80.00%
Income Tax Jurisdiction, Domestic Federal [Member] \| Internal Revenue Service (IRS) [Member]
Open Tax Year		2023 2024 2025 2026
Income Tax Jurisdiction, Foreign [Member] \| Canada Revenue Agency [Member]
Operating Loss Carryforwards		$ 1,650,146
Open Tax Year		2022 2023 2024 2025 2026
Income Tax Jurisdiction, Foreign [Member] \| Portuguese Tax Authority [Member]
Open Tax Year		2022 2023 2024 2025 2026
Income Tax Jurisdiction, Foreign [Member] \| Federal Ministry of Finance, Germany [Member]
Open Tax Year		2021 2022 2023 2024 2025 2026
Income Tax Jurisdiction, Foreign [Member] \| Australian Taxation Office [Member]
Open Tax Year		2022 2023 2024 2025 2026