Note R - Derivative Financial Instruments - Impact of the Company's Derivative Instruments on the Consolidated Statement of Operations and Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Unrealized gain (loss) on hedges	$ 2,250	$ 760
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Unrealized Gain (Loss) on Hedges [Member] | Cash Flow Hedging [Member]
Unrealized gain (loss) on hedges	1,034	425
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Interest Expense [Member]
Gain (loss) on derivative instruments	362	399
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member] | Other Nonoperating Income (Expense) [Member]
Gain (loss) on derivative instruments	0	(15)
Euro Denominated Revolving Loan [Member] | Designated as Hedging Instrument [Member] | Unrealized Gain (Loss) on Hedges [Member] | Net Investment Hedging [Member]
Unrealized gain (loss) on hedges	$ 1,216	$ 335