Note D - Accumulated Other Comprehensive (Loss) Income - Accumulated Other Comprehensive (Loss) Income (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Loss, Beginning Balance	$ (643,000)	$ (502,000)	$ (643,000)	$ (502,000)
Other Comprehensive Income Before Reclassifications
Amounts Reclassified from OCI
Tax Effect of OCI Activity
Other Comprehensive Income
Accumulated Other Comprehensive Loss, Ending Balance	$ (643,000)	$ (502,000)	$ (643,000)	$ (502,000)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Loss, Beginning Balance	151,000	773,000	(123,000)	33,000
Other Comprehensive Income Before Reclassifications	(613,000)	939,000	(131,000)	2,662,000
Amounts Reclassified from OCI	(120,000)	(879,000)	(178,000)	(1,464,000)
Tax Effect of OCI Activity	260,000	(21,000)	110,000	(419,000)
Other Comprehensive Income	(473,000)	39,000	(199,000)	779,000
Accumulated Other Comprehensive Loss, Ending Balance	(322,000)	812,000	(322,000)	812,000
Accumulated Other Comprehensive Loss, Beginning Balance	(492,000)	271,000	(766,000)	(469,000)
Other Comprehensive Income Before Reclassifications	(613,000)	939,000	(131,000)	2,662,000
Amounts Reclassified from OCI	(120,000)	(879,000)	(178,000)	(1,464,000)
Tax Effect of OCI Activity	260,000	(21,000)	110,000	(419,000)
Other Comprehensive Income	(473,000)	39,000	(199,000)	779,000
Accumulated Other Comprehensive Loss, Ending Balance	$ (965,000)	$ 310,000	$ (965,000)	$ 310,000