Registration of securities issued in business combination transactions

Segments of Business - Summary of Revenues, Operating Loss, Long-Lived Assets By Geographic Area (Details) (10-K)

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Segments of Business - Summary of Revenues, Operating Loss, Long-Lived Assets By Geographic Area (Details) (10-K) - USD ($)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
Segment Reporting Information [Line Items]            
Revenue: $ 9,653,440 $ 10,098,400 $ 30,561,983 $ 30,493,839 $ 40,613,709 $ 41,432,863
Operating Income (Loss): (4,233,442) (671,316) (8,926,026) (3,472,503) (5,355,101) (5,235,377)
Non-current Assets: 38,386,754 [1]   38,386,754 [1]   28,118,104 28,383,458
United States [Member]            
Segment Reporting Information [Line Items]            
Revenue: 7,635,120 8,038,545 24,441,959 23,984,963 31,930,427 32,804,708
Operating Income (Loss): (4,380,394) (711,846) (9,080,259) (2,179,967) (5,666,969) (4,554,429)
Non-current Assets: 35,825,711 [1]   35,825,711 [1]   24,795,368 24,630,101
South Africa [Member]            
Segment Reporting Information [Line Items]            
Revenue: 1,383,906 1,352,340 4,123,148 4,321,668 5,825,967 5,777,306
Operating Income (Loss): 110,956 29,485 77,682 50,680 139,088 (798,914)
Non-current Assets: [1],[2]   [1],[2]   909,514 [2] 1,203,610
Europe [Member]            
Segment Reporting Information [Line Items]            
Revenue: 634,414 707,515 1,996,876 2,187,208 2,857,315 2,850,849
Operating Income (Loss): 35,996 $ 11,045 76,551 $ (1,343,216) 172,780 117,966
Non-current Assets: $ 2,561,043 [1]   $ 2,561,043 [1]   $ 2,413,222 $ 2,549,747
[1] Non-current assets increased due to the adoption of ASC 842 effective January 1, 2019.
[2] Amounts are included in assets held for sale at September 30, 2019.