Note L - Derivatives and Hedging (Details Textual) $ in Thousands, € in Millions, SFr in Millions		12 Months Ended
	Aug. 18, 2021 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 EUR (€)	Jun. 30, 2023 CHF (SFr)	Aug. 23, 2021
Deferred Tax Assets, Derivative Instruments		$ 56	$ 0
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
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%
Cash Flow Hedging [Member]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax		$ 500	5,400
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Interest Income, Effective Portion, Net		3,100	3,000
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative, Notional Amount		12,300			SFr 11.1
Foreign Exchange Contract [Member] | Cash Flow Hedging [Member]
Derivative, Notional Amount		31,700		€ 28.4
Accumulated Other Comprehensive Income (Loss) Cumulative Cash Flow Hedges, Gain (Loss)		200	(2,300)
Deferred Tax Assets, Derivative Instruments		100	$ 500
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months		$ 200
Interest Rate Swap [Member]
Derivative, Fixed Interest Rate	2.40%					2.40%