Quarterly report pursuant to Section 13 or 15(d)

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

v3.10.0.1
Segment Information - Summary of Revenues, Operating Loss, Long-Lived Assets By Geographic Area (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Segment Reporting Information [Line Items]          
Revenue: $ 10,098,400 $ 10,725,363 $ 30,493,839 $ 31,350,678  
Operating Income (Loss): [1] (671,316) (1,398,445) (3,472,503) (3,469,287)  
Non-current Assets: 27,579,320   27,579,320   $ 28,383,458
United States [Member]          
Segment Reporting Information [Line Items]          
Revenue: 8,038,545 8,353,053 23,984,963 24,863,979  
Operating Income (Loss): [1] (711,846) (767,659) (2,179,967) (2,832,502)  
Non-current Assets: 24,771,692   24,771,692   24,630,101
South Africa [Member]          
Segment Reporting Information [Line Items]          
Revenue: 1,352,340 1,502,349 4,321,668 4,369,122  
Operating Income (Loss): [1] 29,485 (684,022) 50,680 (769,536)  
Non-current Assets: 957,143   957,143   1,203,610
Europe [Member]          
Segment Reporting Information [Line Items]          
Revenue: 707,515 869,961 2,187,208 2,117,577  
Operating Income (Loss): [1] 11,045 $ 53,236 (1,343,215) $ 132,751  
Non-current Assets: $ 1,850,485   $ 1,850,485   $ 2,549,747
[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.