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Condensed Consolidated Statements of Operations - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Income Statement [Abstract]        
Net revenues $ 9,598,177 $ 9,417,443 $ 17,928,911 $ 18,147,303
Costs and expenses:        
Cost of products sold 2,609,982 1,792,293 4,244,163 3,451,082
Selling and marketing 3,865,406 3,982,379 7,573,082 7,419,311
Research and development 1,421,502 1,716,169 3,144,057 3,115,856
General and administrative 2,190,764 2,270,318 4,227,048 4,807,057
Amortization 1,091,485 1,029,708 2,167,524 2,051,353
Total costs and expenses 11,179,139 10,790,867 21,355,874 20,844,659
Operating income (loss) (1,580,962) (1,373,424) (3,426,963) (2,697,356)
Interest income 28,661 130,565 58,549 246,426
Interest expense (119,455) (91,200) (152,520) (152,111)
Income (loss) from continuing operations before income taxes (1,671,756) (1,334,059) (3,520,934) (2,603,041)
Income tax (expense) benefit (7,455) (4,462) (41,695) 76,966
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total (1,679,211) (1,338,521) (3,562,629) (2,526,075)
Discontinued operations 738,622 771,709 1,556,895 1,918,845
Net income (loss) (940,589) (566,812) (2,005,734) (607,230)
Net (income) loss at subsidiary attributable to noncontrolling interests 22,314 17,305 31,839 (16,155)
Net income (loss) attributable to common shareholders $ (918,275) $ (549,507) $ (1,973,895) $ (623,385)
Earnings (loss) per share attributable to common shareholders        
Earnings (loss) per share attributable to common shareholders - Continuing operations - basic (in dollars per share) $ (0.11) $ (0.09) $ (0.23) $ (0.16)
Earnings (loss) per share attributable to common shareholders - Discontinued operations - basic (in dollars per share) 0.05 0.05 0.10 0.12
Earnings (loss) per share attributable to common shareholders - basic (in dollars per share) (0.06) (0.04) (0.13) (0.04)
Earnings (loss) per share attributable to common shareholders - Continuing operations - diluted (in dollars per share) (0.11) (0.09) (0.23) (0.16)
Earnings (loss) per share attributable to common shareholders - Discontinued operations - diluted (in dollars per share) 0.05 0.05 0.10 0.12
Earnings (loss) per share attributable to common shareholders - diluted (in dollars per share) $ (0.06) $ (0.04) $ (0.13) $ (0.04)
Weighted-average shares outstanding        
- basic (in shares) 15,241,463 15,523,628 15,241,020 15,497,989
- diluted (in shares) 15,241,463 15,523,628 15,241,020 15,497,989