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Note H - Employee Benefit Plans - Defined Benefit Plan's Weighted Average Asset Association and Weighted Average Target Allocation (Details) - Pension Plan [Member]	Jun. 30, 2024	Jun. 30, 2023
Weighted-average asset allocation	100.00%	100.00%
Target allocation	100.00%
Equity Securities [Member]
Weighted-average asset allocation	72.00%	64.00%
Target allocation	53.00%
Debt Securities [Member]
Weighted-average asset allocation	14.00%	14.00%
Target allocation	41.00%
Commodity Contract [Member]
Weighted-average asset allocation	0.00%	12.00%
Target allocation	4.00%
Cash Equivalents [Member]
Weighted-average asset allocation	14.00%	10.00%
Target allocation	2.00%

X

- Definition

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480482/715-20-55-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

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X

- Definition

Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

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