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Valuation and Qualifying Accounts Allowance for Returns and Doubtful Accounts (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Accounts Receivable, Allowance for Credit Loss [Roll Forward]    
Balance at Beginning of Period $ 216,153 $ 162,112
Charges (Benefits) to Revenue 4,464 148,624
(Increases) Deductions 69,282 94,583
Balance at End of Period $ 151,335 $ 216,153