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Restatement of Previously Issued Financial Statements (Details) - USD ($)
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Total net sales $ 5,386,000 $ 4,646,000  
Operating loss (1,759,000) (1,156,000)  
Net loss (737,000) (925,000)  
Total Shareholders' Equity 6,013,000   $ 6,668,000
As Previously Reported      
Total net sales 5,419,000 4,682,000  
Operating loss (1,708,000) (1,109,000)  
Net loss (659,000) $ (863,000)  
Total Shareholders' Equity $ 7,117,000   $ 7,694,000