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Note G - Employee Benefits Plans - Fair Values by Asset Category of Defined Benefit Pension Plan (Details) - USD ($) $ in Thousands | Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2014
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Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Cash and money market funds |  | $ 41 |  |
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Cash and money market funds |  |  |  |
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Cash and money market funds |  |  |  |
Cash and Cash Equivalents [Member] |  |  |  |
Cash and money market funds |  | 41 |  |
Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Cash and money market funds | [1] | 785 |  |
Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Cash and money market funds | [1] |  |  |
Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Cash and money market funds | [1] |  |  |
Equity Securities [Member] |  |  |  |
Cash and money market funds | [1] | 785 |  |
Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Cash and money market funds | [2] | 745 |  |
Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Cash and money market funds | [2] |  |  |
Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Cash and money market funds | [2] |  |  |
Debt Securities [Member] |  |  |  |
Cash and money market funds | [2] | 745 |  |
Fair Value, Inputs, Level 1 [Member] |  |  |  |
Cash and money market funds |  | 1,571 |  |
Fair Value, Inputs, Level 2 [Member] |  |  |  |
Cash and money market funds |  |  |  |
Fair Value, Inputs, Level 3 [Member] |  |  |  |
Cash and money market funds |  |  |  |
Cash and money market funds |  | $ 1,571 | $ 1,642 | $ 1,719
[1] | This category is comprised of publicly traded funds, of which 47% are large-cap funds, 28% are mid-cap and small-cap, 8% are emerging markets equity funds, and 17% are international equity funds.
[2] | This category is comprised of publicly traded funds, of which 6% are long-term fixed income funds,14% are high-yield fixed income funds, 38% are intermediate fixed income funds, 27% are REITs and MLPs funds, and 15% are international/emerging markets funds.

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- Definition Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=64937038&loc=d3e12355-114930 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Plan Assets -URI http://asc.fasb.org/extlink&oid=6749337 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Plan Assets -URI http://asc.fasb.org/extlink&oid=6520858 + Details
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