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Nature of Business and Summary of Significant Accounting Policies - Summary of Sales by Geographic Area (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Sales by geographic area $ 2,923,148 $ 2,878,059 $ 8,020,927 $ 8,913,122
United States of America [Member]        
Sales by geographic area 2,854,501 2,787,618 7,846,560 8,612,552
Foreign [Member]        
Sales by geographic area $ 68,647 $ 90,441 $ 174,367 $ 300,570