Note L - Derivatives and Hedging (Details Textual) € in Millions, SFr in Millions	12 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 EUR (€)	Jun. 30, 2021 CHF (SFr)
Accumulated Other Comprehensive Income (Loss) Cumulative Cash Flow Hedges, Gain (Loss)	$ (33,000)	$ (400,000)
Deferred Tax Assets, Derivative Instruments	8,000	93,000
Deferred Tax Liabilities, Derivatives		100,000
Derivative Liability, Current	814,000
Derivative Liability, Noncurrent	4,000	195,000
Reclassification out of Accumulated Other Comprehensive Income [Member]
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months	6,000
Cash Flow Hedging [Member]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax	(2,800,000)	1,400,000
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Interest Income, Effective Portion, Net	(3,200,000)	2,700,000
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net, Total		$ 100,000
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative, Notional Amount	6,200,000			SFr 5.5
Derivative Liability, Current	200,000
Foreign Exchange Contract [Member] | Cash Flow Hedging [Member]
Derivative, Notional Amount	60,400,000		€ 51.3
Derivative Liability, Current	600,000
Derivative Liability, Noncurrent	$ 4,000