Note D - Accumulated Other Comprehensive (Loss) Income - Accumulated Other Comprehensive (Loss) Income (Details) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
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	(79,000)	753,000	(123,000)	33,000
Other Comprehensive Income Before Reclassifications	424,000	461,000	482,000	1,723,000
Amounts Reclassified from OCI	(69,000)	(430,000)	(58,000)	(585,000)
Tax Effect of OCI Activity	(125,000)	(11,000)	(150,000)	(398,000)
Other Comprehensive Income	230,000	20,000	274,000	740,000
Accumulated Other Comprehensive Loss, Ending Balance	151,000	773,000	151,000	773,000
Accumulated Other Comprehensive Loss, Beginning Balance	(722,000)	251,000	(766,000)	(469,000)
Other Comprehensive Income Before Reclassifications	424,000	461,000	482,000	1,723,000
Amounts Reclassified from OCI	(69,000)	(430,000)	(58,000)	(585,000)
Tax Effect of OCI Activity	(125,000)	(11,000)	(150,000)	(398,000)
Other Comprehensive Income	230,000	20,000	274,000	740,000
Accumulated Other Comprehensive Loss, Ending Balance	$ (492,000)	$ 271,000	$ (492,000)	$ 271,000