Note G - Employee Benefits Plans - Defined Benefit Pension Plan's Weighted Average Asset Allocation and Weighted Average Target Allocation (Details)	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Equity Securities [Member]
Weighted-average asset allocation	53.00%	49.00%
Weighted-average target allocation	49.00%
Debt Securities [Member]
Weighted-average asset allocation	45.00%	45.00%
Weighted-average target allocation	46.00%
Commodity Contract [Member]
Weighted-average asset allocation	0.00%	0.00%
Weighted-average target allocation	2.00%
Cash and Cash Equivalents [Member]
Weighted-average asset allocation	2.00%	6.00%
Weighted-average target allocation	3.00%
Weighted-average asset allocation	100.00%	100.00%
Weighted-average target allocation	100.00%