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Note 1 - Summary of Accounting Policies (Details Textual)
shares in Thousands, $ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2023
USD ($)
Jun. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Jun. 30, 2023
USD ($)
shares
Jun. 30, 2022
USD ($)
shares
Jun. 30, 2021
USD ($)
shares
Dec. 31, 2022
USD ($)
Payment for Contingent Consideration Liability, Financing Activities       $ 1,167 $ 2,167 $ 356  
Business Combination, Contingent Consideration, Liability, Total [1]             $ 1,167
Equity Securities without Readily Determinable Fair Value, Amount       2,000      
Payments to Acquire Debt Securities, Available-for-Sale       2,700      
Income Tax Expense (Benefit)       $ 24,796 $ 19,807 $ 14,157  
Effective Income Tax Rate Reconciliation, Percent       15.10% 24.40% 26.90%  
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, 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  
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares       0 0 0  
Tax Years 2019 and 2020 [Member]              
Income Tax Expense (Benefit), CARES Act           $ (1,000)  
Selling, General and Administrative Expenses [Member]              
Advertising Expense       $ 2,700 $ 2,300 1,700  
Research and Development Expense       $ 17,200 12,200 $ 9,600  
Revenue Benchmark [Member]              
Concentration Risk, Threshold Percentage       5.00%      
Customer Concentration Risk [Member] | Revenue Benchmark [Member]              
Number of Major Customers       0      
Fair Value, Inputs, Level 3 [Member]              
Business Combination, Contingent Consideration, Liability, Total [1]             $ 0
Fair Value, Inputs, Level 3 [Member] | Maximum [Member]              
Equity Securities, FV-NI, Unrealized Gain (Loss)       $ 100      
GS Engineering [Member]              
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High       12,800      
Renco Electronics [Member]              
Payment for Contingent Consideration Liability, Financing Activities $ 1,200 $ 1,000 $ 1,200        
Business Combination, Contingent Consideration, Liability, Total   3,400     3,400    
Other Noncurrent Assets [Member]              
Debt Securities, Trading   $ 3,000   $ 3,700 $ 3,000    
[1] The fair value of our contingent consideration arrangement is determined based on our evaluation as to the probability and amount of any deferred compensation that has been earned to date.