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Note J - Derivatives and Hedging (Details Textual)
€ in Millions
3 Months Ended
Sep. 30, 2017
USD ($)
Sep. 30, 2016
USD ($)
Sep. 30, 2017
EUR (€)
Jun. 30, 2017
USD ($)
Gain (Loss) on Cash Flow Hedge Ineffectiveness, Net $ 0      
Unrealized Loss on Foreign Currency Derivatives, before Tax 2,400,000      
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value 2,300,000      
Cash Flow Hedging [Member]        
Derivative Instruments, Loss Recognized in Other Comprehensive Income (Loss), Effective Portion 2,200,000      
Derivative Instruments, Gain Reclassified from Accumulated OCI into Income, Effective Portion 422,000      
Derivative Instruments, Gain Recognized in Other Comprehensive Income (Loss), Effective Portion   $ 452,000    
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion   $ 58,000    
Forward Contract [Member]        
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value 1,600,000      
Other Noncurrent Liabilities [Member]        
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value 689,000     $ 99,000
Accrued Liabilities [Member]        
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value       $ 422,000
Reclassification out of Accumulated Other Comprehensive Income [Member]        
Foreign Currency Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months (1,600,000)      
Cash Flow Hedging Foreign Exchange Contract [Member]        
Derivative, Notional Amount $ 62,700,000   € 54.2