Note 9 - Income Taxes - Reconciliation of Effective Income Tax Rate (Details)	12 Months Ended
May 31, 2025	May 31, 2024
Tax provision using statutory rates	21.00%	21.00%
State income taxes	6.00%	8.00%
Permanent differences	8.00%	0.00%
Change in state rates	0.00%	(10.00%)
Change in valuation allowance	(3.00%)	(2.00%)
Tax provision per consolidated financial statements	32.00%	17.00%

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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