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Schedule II - Valuation and Qualifying Accounts - Bad Debt Expense and Reserves for Obsolete Inventory (Details) - USD ($)
12 Months Ended 24 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2019
Bad debt expense $ 320,270 $ 25,044 $ 25,044
Reserve for obsolete inventory $ 266,021   $ 127,293