XML 47 R36.htm IDEA: XBRL DOCUMENT v3.19.2
Nature of Business and Summary of Significant Accounting Policies - Summary of Sales by Geographic Area (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Sales by geographic area $ 2,546,983 $ 3,563,550 $ 5,097,779 $ 6,035,063
United States of America [Member]        
Sales by geographic area 2,477,717 3,386,146 4,992,059 5,824,934
Foreign [Member]        
Sales by geographic area $ 69,266 $ 177,404 $ 105,720 $ 210,129