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Note G - Employee Benefit Plans - Defined Benefit Pension Plan's Weighted Average Asset Association and Weighted Average Target Allocation (Details) | Jun. 30, 2018 | Jun. 30, 2017
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Weighted-average asset allocation | 100.00% | 100.00%
Weighted-average target allocation | 100.00% |
Equity Securities [Member] |  |
Weighted-average asset allocation | 51.00% | 41.00%
Weighted-average target allocation | 49.00% |
Debt Securities [Member] |  |
Weighted-average asset allocation | 47.00% | 44.00%
Weighted-average target allocation | 46.00% |
Commodity Contract [Member] |  |
Weighted-average asset allocation | 0.00% | 2.00%
Weighted-average target allocation | 2.00% |
Cash and Cash Equivalents [Member] |  |
Weighted-average asset allocation | 2.00% | 13.00%
Weighted-average target allocation | 3.00% |

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- 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 -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 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- 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 -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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