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Note 8 - Debt (Details Textual) $ in Thousands | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 31, 2019 USD ($) | Jun. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($)
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 |  | 13.10 |  |
Leverage Ratio, Requirement, Maximum Under Certain Circumstances in Connection Material Acquisition |  | 4.0 |  |
Leverage Ratio, Actual |  | 1.31 |  |
Long-term Line of Credit, Total |  | $ 200,000 |  |
Line of Credit Facility, Interest Rate at Period End |  | 2.59% |  |
Renco Electronics [Member] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt |  | $ 712 | $ 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 |  | $ 245,200 |  |
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 |  | $ 6,000 |  | $ 7,300

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- Definition The amount of extraordinary and certain other defined items such as non-cash restructuring and acquisition-related charges, as a percentage of EBITDA, that is excluded from Adjusted EBIT per the Credit Agreement in calculating the Company's Interest Coverage Ratio. + References No definition available. + Details
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- Definition The interest coverage ratio, which is ratio of "Adjusted EBIT per the Credit Agreement" to interest expense for the trailing twelve months, required by the credit agreement for the Company's unsecured Revolving Credit Facility entered into on January 5, 2012. Adjusted EBIT per the Credit Agreement specifically excludes extraordinary and certain other defined items such as non-cash restructuring and acquisition-related charges up to $2.0 million, and goodwill impairment. + References No definition available. + Details
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