Note L - Derivatives and Hedging (Details Textual) € in Millions, SFr in Millions		12 Months Ended
	Aug. 18, 2021 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 EUR (€)	Jun. 30, 2022 CHF (SFr)
Deferred Tax Assets, Derivative Instruments		$ 0	$ 8,000
Wells Fargo Bank, N.A. [Member] | Credit Agreement [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Debt Instrument, Basis Spread on Variable Rate		1.29%
Wells Fargo Bank, N.A. [Member] | Credit Agreement [Member] | Term Loan [Member]
Debt Instrument, Face Amount	$ 10,000,000.0
Wells Fargo Bank, N.A. [Member] | Credit Agreement [Member] | Term Loan [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	1.80%
Reclassification out of Accumulated Other Comprehensive Income [Member]
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months		$ (1,900,000)
Cash Flow Hedging [Member]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax		5,400,000	(2,800,000)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Interest Income, Effective Portion, Net		3,000,000.0	(3,200,000)
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative, Notional Amount		5,200,000			SFr 5
Foreign Exchange Contract [Member] | Cash Flow Hedging [Member]
Derivative, Notional Amount		37,700,000		€ 31.9
Accumulated Other Comprehensive Income (Loss) Cumulative Cash Flow Hedges, Gain (Loss)		2,300,000	(33,000)
Deferred Tax Assets, Derivative Instruments		$ 542,000	$ 8,000
Interest Rate Swap [Member]
Derivative, Fixed Interest Rate	2.40%