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Note 2 - Investment in Innolectric (Details Textual)
$ in Thousands, € in Millions
12 Months Ended
Feb. 01, 2023
USD ($)
Feb. 01, 2023
EUR (€)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2024
EUR (€)
Dec. 31, 2023
EUR (€)
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures     $ 9,265 $ 10,282    
Innolectric AG [Member]            
Loans and Leases Receivable, Related Parties     $ 2,900 2,100 € 2.8 € 2.0
Loans and Leases Receivable, Interest Rate     5.00%   5.00%  
Innolectric AG [Member] | Power Solutions and Protection Segment [Member]            
Net Income (Loss) Attributable to Noncontrolling Interest     $ 600 $ 800    
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