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Note K - Derivatives and Hedging (Details Textual)
€ in Millions, SFr in Millions
Aug. 18, 2021
USD ($)
Mar. 31, 2024
USD ($)
Mar. 31, 2024
EUR (€)
Mar. 31, 2024
CHF (SFr)
Aug. 23, 2021
Accumulated Other Comprehensive Income (Loss) Cumulative Cash Flow Hedges, Gain (Loss)   $ 100,000      
Deferred Tax Assets, Derivative Instruments   26,000      
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Secured Overnight Financing Rate (SOFR) [Member]        
Wells Fargo Bank, N.A. [Member] | Credit Agreement [Member] | Term Loan [Member]          
Debt Instrument, Face Amount $ 10,000,000        
Debt Instrument, Basis Spread on Variable Rate 1.80%        
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument [Member]          
Derivative, Notional Amount   12,600,000   SFr 11  
Interest Rate Swap [Member]          
Derivative, Fixed Interest Rate 2.40%       2.40%
Cash Flow Hedging [Member] | Foreign Exchange Contract [Member]          
Derivative, Notional Amount   $ 13,600,000 € 12.2