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Nature of Business and Summary of Significant Accounting Policies (Tables)
3 Months Ended
Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Summary of Sales by Geographic Area

For the three months ended March 31, 2021 and 2020, sales by geographic area were as follows:

 

    Three Months Ended
March 31,
 
    2021     2020  
Sales by geographic area:                
United States of America   $ 2,477,195     $ 2,371,687  
Foreign     58,634       54,058  
    $ 2,535,829     $ 2,425,745