Quarterly report pursuant to Section 13 or 15(d)

Segments of Business - Summary of Revenues, Operating Loss, Long-Lived Assets By Geographic Area (Details)

v3.19.1
Segments of Business - Summary of Revenues, Operating Loss, Long-Lived Assets By Geographic Area (Details) - USD ($)
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Segment Reporting Information [Line Items]      
Revenue: $ 10,197,770 $ 9,995,516  
Operating Income (Loss): (1,708,038) (2,380,841)  
Non-current Assets: 46,383,181   $ 28,118,104
United States [Member]      
Segment Reporting Information [Line Items]      
Revenue: 8,152,739 7,782,401  
Operating Income (Loss): [1] (1,729,350) (963,012)  
Non-current Assets: 41,304,116   24,795,368
South Africa [Member]      
Segment Reporting Information [Line Items]      
Revenue: 1,392,303 1,501,419  
Operating Income (Loss): [1] 16,594 10,546  
Non-current Assets: 1,757,472   909,514
Europe [Member]      
Segment Reporting Information [Line Items]      
Revenue: 652,728 711,696  
Operating Income (Loss): [1] 4,718 $ (1,428,375)  
Non-current Assets: $ 3,321,593   $ 2,413,222
[1] Note that Operating Income (Loss) includes non-cash impairment charges of $1.7 million and $1.5 for the nine months ended September 30, 2018 and 2017, respectively and $0 and $0.8 million for the three months ended September 30, 2018 and 2017, respectively.