Note H - Employee Benefit Plans - Defined Benefit Plan's Weighted Average Asset Association and Weighted Average Target Allocation (Details) - Pension Plan [Member] |
Jun. 30, 2026 |
Jun. 30, 2025 |
|---|---|---|
| Weighted-average asset allocation | 100.00% | 100.00% |
| Target allocation | 100.00% | |
| Equity Securities [Member] | ||
| Weighted-average asset allocation | 68.00% | 60.00% |
| Target allocation | 53.00% | |
| Debt Securities [Member] | ||
| Weighted-average asset allocation | 29.00% | 35.00% |
| Target allocation | 41.00% | |
| Cash Equivalents [Member] | ||
| Weighted-average asset allocation | 3.00% | 4.00% |
| Target allocation | 2.00% | |
| Commodity Contract [Member] | ||
| Weighted-average asset allocation | 0.00% | 1.00% |
| Target allocation | 4.00% |