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Note H - Employee Benefit Plans - Fair Values by Asset Category of Defined Benefit Pension Plan (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2022
--- | --- | --- | ---
Fair value by asset category |  | $ 1,232 | $ 1,025 | $ 1,094
Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair value by asset category |  | 1,232 |  |
Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair value by asset category |  | 0 |  |
Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair value by asset category |  | 0 |  |
Equity Securities [Member] |  |  |  |
Fair value by asset category | [1] | 889 |  |
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair value by asset category | [1] | 889 |  |
Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair value by asset category | [1] | 0 |  |
Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair value by asset category | [1] | 0 |  |
Debt Securities [Member] |  |  |  |
Fair value by asset category | [2] | 173 |  |
Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair value by asset category | [2] | 173 |  |
Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair value by asset category | [2] | 0 |  |
Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair value by asset category | [2] | 0 |  |
Cash Equivalents [Member] |  |  |  |
Fair value by asset category | [3] | 170 |  |
Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair value by asset category | [3] | 170 |  |
Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair value by asset category | [3] | 0 |  |
Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair value by asset category | [3] | $ 0 |  |
[1] | This category is comprised of publicly traded funds of which 72% are U.S. large-cap funds, 24% emerging market funds, and 4% non-U.S. developed market funds.
[2] | This category is comprised of publicly traded funds, of which 77% are U.S. fixed income funds and 23% are corporate fixed income funds.
[3] | This category is comprised of money market funds.

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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + 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)(iv)(02) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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