Note D - Accumulated Other Comprehensive (Loss) Income (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Including Portion Attributable to Noncontrolling Interest [Member]
Revenue, Net	$ 118,000	$ 875,000	$ 125,000
Other Nonoperating Income (Expense)	2,000		53,000
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member]
Revenue, Net				$ 1,500,000
Other Nonoperating Income (Expense)		4,000		13,000
Revenue, Net	30,006,000	19,613,000	78,502,000	56,926,000
Other Nonoperating Income (Expense)	$ 1,611,000	$ 1,000	$ 1,601,000	$ (23,000)