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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