Note S - Derivative Financial Instruments (Details Textual) $ in Thousands, € in Millions	12 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 EUR (€)
Equity, Including Portion Attributable to Noncontrolling Interest	$ 155,054	$ 145,517	$ 131,188
Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months	218
Interest Rate Swap [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Bank of Montreal [Member]
Equity, Including Portion Attributable to Noncontrolling Interest	504	688
Derivative, Notional Amount	9,500	20,000
Euro Denominated Revolving Loan [Member] | Net Investment Hedging [Member] | Designated as Hedging Instrument [Member]
Derivative, Notional Amount | €				€ 13.5
Derivative, Gain (Loss) on Derivative, Net	$ (1,502)	$ (1,272)