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v3.21.2

Note 1 - Summary of Accounting Policies (Details Textual) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2021 USD ($) | Jun. 30, 2021 USD ($) shares | Jun. 30, 2020 USD ($) shares | Jun. 30, 2019 USD ($) shares
Payment for Contingent Consideration Liability, Financing Activities |  | $ 356 | $ 872 | $ 910
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year) |  | 3 years |  |
Effective Income Tax Rate Before Discretion, at Federal Statutory Income Tax Rate, Percent |  | 21.00% | 21.00% | 21.00%
Income Tax Expense (Benefit), Total |  | $ 14,157 | $ 13,060 | $ 18,688
Effective Income Tax Rate Reconciliation, Percent, Total |  | 26.90% | 24.30% | 27.90%
Effective Income Tax Rate Reconciliation, Mix of Income in Various Jurisdictions |  | $ 5,100 | $ 1,400 |
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount |  | 800 | 1,200 |
Effective Income Tax Rate Reconciliation, Release of Uncertain Tax Provision Reserves |  | 1,700 | 700 |
Effective Income Tax Rate Reconciliation, Disposition of Business, Amount |  | $ 1,200 |  |
Effective Income Tax Rate Reconciliation, GILTI |  |  | $ 800 |
Effective Income Tax Rate Reconciliation, Section 965 Toll Tax, Amount |  |  |  | $ 800
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability |  |  |  | 300
Effective Income Tax Rate Reconciliation, Anticipated Cash Repatriation, Amount |  |  |  | $ 2,100
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares |  | 0 | 32,000 | 0
Tax Years 2019 and 2020 [Member] |  |  |  |
Income Tax Expense (Benefit), CARES Act |  | $ 1,000 |  |
Selling, General and Administrative Expenses [Member] |  |  |  |
Advertising Expense |  | 1,700 | $ 1,300 | $ 2,500
Research and Development Expense, Total |  | $ 9,600 | 6,900 | $ 6,300
Revenue Benchmark [Member] |  |  |  |
Concentration Risk, Threshold Percentage |  | 5.00% |  |
Customer Concentration Risk [Member] | Revenue Benchmark [Member] |  |  |  |
Number of Major Customers |  | 0 |  |
GS Engineering [Member] |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  | $ 12,800 |  |
Renco Electronics [Member] |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  | 3,500 |  |
Renco Electronics [Member] | Forecast [Member] |  |  |  |
Payment for Contingent Consideration Liability, Financing Activities | $ 1,200 |  |  |
Other Noncurrent Assets [Member] |  |  |  |
Trading Securities, Cost |  | $ 3,000 | $ 2,100 |

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