Note H - Employee Benefit Plans - Defined Benefit Pension Plan's Weighted Average Asset Association and Weighted Average Target Allocation (Details)	Jun. 30, 2022	Jun. 30, 2021
Weighted-average asset allocation	100.00%	100.00%
Equity securities	100.00%
Other	100.00%
Equity Securities [Member]
Weighted-average asset allocation	49.00%	62.00%
Equity securities	55.00%
Other	55.00%
Debt Securities [Member]
Weighted-average asset allocation	20.00%	25.00%
Equity securities	41.00%
Other	41.00%
Commodity Contract [Member]
Weighted-average asset allocation	0.00%	12.00%
Equity securities	0.00%
Other	0.00%
Other Contract [Member]
Weighted-average asset allocation	31.00%	1.00%
Equity securities	4.00%
Other	4.00%