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Note 8 - Debt (Details Textual) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2019 USD ($) | Jun. 30, 2022 USD ($) | Jun. 30, 2021 USD ($) | Sep. 30, 2020 USD ($)
Extraordinary and Certain Other Defined Items Excluded from Adjusted EBIT |  | $ 20,000 |  |
Extraordinary and Certain Other Defined Items Excluded from Adjusted EBIT, Percentage of EBITDA |  | 10.00% |  |
Interest Coverage Ratio, Actual |  | 16.0 |  |
Leverage Ratio, Requirement, Maximum Under Certain Circumstances in Connection Material Acquisition |  | 4.0 |  |
Leverage Ratio, Actual |  | 0.98 |  |
Long-Term Line of Credit, Total |  | $ 175,000 |  |
Line of Credit Facility, Interest Rate at Period End |  | 2.53% |  |
Renco Electronics [Member] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt |  | $ 712 |  |
SBA CARES Act Paycheck Protection Program [Member] | Renco Electronics [Member] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt |  |  |  | $ 700
Minimum [Member] |  |  |  |
Interest Coverage Ratio, Requirement |  |  | 2.75 |
Maximum [Member] |  |  |  |
Leverage Ratio, Requirement |  | 3.5 |  |
Amended and Restated Credit Agreement [Member] |  |  |  |
Debt Instrument, Term (Year) | 5 years |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 500,000 |  |  |
Line Of Credit, Accordion Feature | 250,000 |  |  |
Line of Credit Facility, Current Borrowing Capacity |  | $ 312,600 |  |
Swing Line Loan [Member] |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | 10,000 |  |  |
Letter of Credit [Member] |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 35,000 |  |  |
Standby Letters of Credit [Member] |  |  |  |
Long-Term Line of Credit, Total |  | $ 5,100 | $ 6,000 |

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