Note 11 - Long-term Investments (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
May 31, 2026	May 31, 2025	May 31, 2024	Jan. 16, 2025
Equity Securities without Readily Determinable Fair Value, Amount	$ 3,595
Proceeds from Sale of Equity Method Investments	2,566
Unrealized Gain (Loss) on Investments	812	$ 5,500	$ 217
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount	$ 3,796
Superhero Acquisition LP [Member]
Equity Investment, Strike Price (in dollars per share)	$ 1
Equity Securities without Readily Determinable Fair Value, Amount	$ 4,364	$ 8,160
Superhero Acquisition LP [Member] \| Upon U.S. Federal Cannabis Legalization [Member]
Subsidiary, Ownership Percentage, Parent	68.00%			68.00%
Equity Investment, Strike Price (in dollars per share)	$ 1			$ 1

Represents the strike price on an equity investment.

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- Definition

Amount of investment in equity security without readily determinable fair value.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 942
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-Section S45
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

Amount of impairment loss on investment in equity security without readily determinable fair value.

+ References

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

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- Definition

The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

+ References

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- Definition

Amount of unrealized gain (loss) on investment.

+ References

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