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Nature of Business and Summary of Significant Accounting Policies - Summary of Sales by Geographic Area (Details) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Sales by geographic area $ 2,535,829 $ 2,425,745
United States of America [Member]    
Sales by geographic area 2,477,195 2,371,687
Foreign [Member]    
Sales by geographic area $ 58,634 $ 54,058