Note S - Derivative Financial Instruments (Details Textual) $ in Thousands, € in Millions	12 Months Ended
	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2021 EUR (€)	Jun. 29, 2018 USD ($)
Equity, Including Portion Attributable to Noncontrolling Interest	$ 164,391	$ 155,054	$ 145,517
Cash Flow Hedge Gain (Loss) to be Reclassified within 12 Months	(75)
Interest Rate Swap [Member] | Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Bank of Montreal [Member]
Equity, Including Portion Attributable to Noncontrolling Interest	(284)	(504)
Derivative, Notional Amount	7,500				$ 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	$ 129	$ (1,502)