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Note 2 - Investment in Innolectric (Details Textual) $ in Thousands, € in Millions |  | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | ---
Feb. 01, 2023 USD ($) | Feb. 01, 2023 EUR (€) | Sep. 30, 2024 USD ($) | Sep. 30, 2024 EUR (€) | Sep. 30, 2024 USD ($) | Sep. 30, 2024 EUR (€) | Dec. 31, 2023 USD ($) | Dec. 31, 2023 EUR (€)
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures |  |  | $ 10,014 |  | $ 10,014 |  | $ 10,282 |
Innolectric AG [Member] |  |  |  |  |  |  |  |
Loans and Leases Receivable, Related Parties, Additions |  |  |  | € 0.2 | 900 |  |  |
Loans and Leases Receivable, Related Parties |  |  | $ 3,000 |  | $ 3,000 | € 2.8 | $ 2,100 | € 2.0
Loans and Leases Receivable, Interest Rate |  |  | 5.00% |  | 5.00% | 5.00% |  |
Innolectric AG [Member] | Power Solutions and Protection Segment [Member] |  |  |  |  |  |  |  |
Net Income (Loss) Attributable to Noncontrolling Interest |  |  | $ (200) |  | $ (300) |  |  |
Innolectric AG [Member] |  |  |  |  |  |  |  |
Subsidiary, Ownership Percentage, Noncontrolling Owner | 33.33% |  |  |  |  |  |  |
Payments to Acquire Interest in Subsidiaries and Affiliates | $ 8,800 | € 8.0 |  |  |  |  |  |
Business Acquisition, Transaction Costs | 1,300 |  |  |  |  |  |  |
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures | 11,000 |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Liabilities Incurred | $ 1,000 |  |  |  |  |  |  |

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