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Note G - Employee Benefit Plans - Fair Values by Asset Category of Defined Benefit Pension Plan (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
--- | --- | --- | ---
Fair value by asset category |  | $ 1,453 | $ 1,247 | $ 1,571
Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair value by asset category |  | 1,453 |  |
Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair value by asset category |  |  |  |
Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair value by asset category |  |  |  |
Cash and Cash Equivalents [Member] |  |  |  |
Fair value by asset category |  | 30 |  |
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair value by asset category |  | 30 |  |
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair value by asset category |  |  |  |
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair value by asset category |  |  |  |
Commodities and Other [Member] |  |  |  |
Fair value by asset category |  | 1 |  |
Commodities and Other [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair value by asset category |  | 1 |  |
Commodities and Other [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair value by asset category |  |  |  |
Commodities and Other [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair value by asset category |  |  |  |
Equity Securities [Member] |  |  |  |
Fair value by asset category | [1] | 734 |  |
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair value by asset category | [1] | 734 |  |
Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair value by asset category | [1] |  |  |
Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair value by asset category | [1] |  |  |
Debt Securities [Member] |  |  |  |
Fair value by asset category | [2] | 688 |  |
Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair value by asset category | [2] | 688 |  |
Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair value by asset category | [2] |  |  |
Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair value by asset category | [2] |  |  |
[1] | This category is comprised of publicly traded funds, of which 47% are large-cap funds, 27% are mid-cap and small-cap, 16% are developed market funds, 9% are emerging markets equity funds, and 1% are specialty funds.
[2] | This category is comprised of publicly traded funds, of which 18% are REITs, 17% are high-yield fixed income funds, 36% are U.S. fixed income funds, 8% are developed market fixed income funds, and 21% are international/emerging markets 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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 6: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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