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

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- Definition

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

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- Definition

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

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- Definition

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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- Definition

Amount of increase (decrease) in valuation and qualifying accounts and reserves.

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Note 13 - Income Taxes and Deferred Income Taxes (Details Textual) - USD ($) $ in Thousands		12 Months Ended
	Dec. 22, 2017	May 31, 2025	May 31, 2024	May 31, 2023
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%	21.00%
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	0
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Period Increase (Decrease)		179,090	$ 164,471
Domestic Tax Jurisdiction [Member]
Operating Loss Carryforwards		$ 314,512
Net Operating Loss Carryforwards Offset, Percentage Of Taxable Income		80.00%
Domestic Tax Jurisdiction [Member] \| Internal Revenue Service (IRS) [Member]
Open Tax Year		2022 2023 2024 2025
Foreign Tax Jurisdiction [Member] \| Canada Revenue Agency [Member]
Operating Loss Carryforwards		$ 1,544,987
Open Tax Year		2021 2022 2023 2024 2025
Foreign Tax Jurisdiction [Member] \| Portuguese Tax Authority [Member]
Open Tax Year		2021 2022 2023 2024 2025
Foreign Tax Jurisdiction [Member] \| Federal Ministry of Finance, Germany [Member]
Open Tax Year		2020 2021 2022 2023 2024 2025
Foreign Tax Jurisdiction [Member] \| Australian Taxation Office [Member]
Open Tax Year		2021 2022 2023 2024 2025