Annual report pursuant to Section 13 and 15(d)

Note 11 - Acquisition of Nestor Cables (Details Textual)

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Note 11 - Acquisition of Nestor Cables (Details Textual)
€ in Millions
12 Months Ended
Jul. 26, 2022
USD ($)
Jul. 26, 2022
EUR (€)
Sep. 30, 2022
USD ($)
Sep. 30, 2024
USD ($)
Dec. 31, 2023
USD ($)
Sep. 30, 2023
USD ($)
Dec. 31, 2022
USD ($)
Goodwill, Ending Balance       $ 6,627,000 $ 6,528,000 $ 6,528,000 $ 6,402,000
Nestor Cables [Member]              
Business Acquisition, Percentage of Voting Interests Acquired 100.00%            
Business Combination, Consideration Transferred, Total $ 8,000,000 € 7.9          
Business Combination, Consideration Transferred, Liabilities Incurred 7,800,000 € 7.6          
Goodwill, Ending Balance $ 1,762,000            
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year) 12 years 9 months 25 days 12 years 9 months 25 days          
Nestor Cables [Member] | Selling, General and Administrative Expenses [Member]              
Business Combination, Acquisition Related Costs     $ 1,600,000        
Nestor Cables [Member] | Approximate [Member]              
Goodwill, Ending Balance $ 1,700,000            
Nestor Cables [Member] | Revolving Credit Facility [Member]              
Proceeds from Lines of Credit $ 16,700,000