Note B - Acquisition of Katsa Oy - Schedule of Intangible Assets (Details) - USD ($) $ in Millions		12 Months Ended
May 31, 2024	Jun. 30, 2024
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)		6 years
Katsa Oy [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	$ 3.4
Katsa Oy [Member] \| Customer Relationships [Member]
Intangible Assets	$ 1.5
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)	12 years
Katsa Oy [Member] \| Trade Names [Member]
Intangible Assets	$ 0.9
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)	10 years
Katsa Oy [Member] \| Technology Know-How [Member]
Intangible Assets	$ 1.0
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)	7 years

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482665/350-30-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 985
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481283/985-20-50-2

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- Definition

Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479907/805-20-50-1

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- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482665/350-30-50-1

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