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Related Party Transactions (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Related Party Transactions (Textual)    
Sales to the affiliated companies $ 2,212,000 $ 1,788,000
Charges to the affiliated companies for services 871,000 779,000
Receivables due from affiliated companies 1,496,000 962,000
Reimburse business related expenditures 199,000 113,000
Research and development costs 54,000 59,000
Insurance Broker [Member]    
Related Party Transactions (Textual)    
Insurance premiums paid 1,365,000 1,424,000
Service [Member]    
Related Party Transactions (Textual)    
The production of television commercials 20,000 21,000
Charter boat services 9,000 31,000
Research and development costs 48,000 42,000
Total payments to affiliated company $ 77,000 $ 94,000