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Note 11 - Income Taxes (Details Textual) - USD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Effective Income Tax Rate Reconciliation, Mix of Income in Various Jurisdictions $ (4,300) $ 4,300 $ 5,100  
Effective Income Tax Rate Reconciliation, Tax Credit, Amount 14,300      
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount 11,600      
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount 2,700 2,200 800  
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount 11,300      
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount 5,000      
Effective Income Tax Rate Reconciliation, US Tax Effects of International Operations 4,300      
Effective Income Tax Rate Reconciliation, Return-to-accrual Adjustments to True-up Up Prior-period Provision Amounts   1,300    
Effective Income Tax Rate Reconciliation, Release of Uncertain Tax Provision Reserves   1,000 1,700  
Effective Income Tax Rate Reconciliation, Disposition of Business, Amount     1,200  
Effective Income Tax Rate Reconciliation, Tax Expense (Benefit), Share-Based Payment Arrangement, Amount 100      
Deferred Tax Liabilities, Previously Undistributed Foreign Earnings 1,700      
Unrecognized Tax Benefits 9,493 9,559 9,412 $ 9,286
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 9,500      
Unrecognized Tax Benefits, Interest on Income Taxes Accrued 1,200 $ 1,100    
State and Local Jurisdiction [Member]        
Operating Loss Carryforwards 34,900      
Tax Credit Carryforward, Amount 4,900      
Foreign Tax Authority [Member]        
Operating Loss Carryforwards $ 3,200      
Tax Years 2019 and 2020 [Member]        
Income Tax Expense (Benefit), CARES Act     $ (1,000)