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 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Segment Reporting Information [Line Items]          
Revenue: $ 10,399,924 $ 10,765,318 $ 20,395,439 $ 20,625,315  
Operating Income (Loss): [1] (420,345) (1,081,453) (2,801,187) (2,070,842)  
Non-current Assets: 25,215,803   25,215,803   $ 28,383,458
United States [Member]          
Segment Reporting Information [Line Items]          
Revenue: 8,164,018 8,598,832 15,946,418 16,510,926  
Operating Income (Loss): [1] (505,109) (1,123,771) (1,468,121) (2,064,843)  
Non-current Assets: 24,207,242   24,207,242   24,630,101
South Africa [Member]          
Segment Reporting Information [Line Items]          
Revenue: 1,467,909 1,482,379 2,969,328 2,866,773  
Operating Income (Loss): [1] 10,649 (28,453) 21,195 (85,514)  
Non-current Assets: 1,008,561   1,008,561   1,203,610
Europe [Member]          
Segment Reporting Information [Line Items]          
Revenue: 767,997 684,107 1,479,693 1,247,616  
Operating Income (Loss): [1] 74,115 $ 70,770 (1,354,260) $ 79,515  
Non-current Assets:     $ 2,549,747
[1] Note that Operating Income (Loss) includes $1.7 million of non-cash impairment charges