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Condensed Consolidated Statements of Operations - USD ($)
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Income Statement [Abstract]    
Net revenues $ 10,537,159 $ 8,330,734
Costs and expenses:    
Cost of products sold 2,417,329 1,634,181
Selling and marketing 3,787,340 3,707,676
Research and development 1,257,367 1,722,555
General and administrative 2,230,509 2,036,284
Amortization 1,168,914 1,076,039
Total costs and expenses 10,861,459 10,176,735
Operating income (loss) (324,300) (1,846,001)
Interest income 5,426 29,888
Interest expense (24,417) (33,065)
Income (loss) from continuing operations before income taxes (343,291) (1,849,178)
Income tax (expense) benefit (7,458) (34,240)
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total (350,749) (1,883,418)
Discontinued operations 495,410 818,273
Net income (loss) 144,661 (1,065,145)
Net (income) loss at subsidiary attributable to noncontrolling interests 22,167 9,525
Net income (loss) attributable to common shareholders $ 166,828 $ (1,055,620)
Earnings (loss) per share attributable to common shareholders    
Earnings (loss) per share attributable to common shareholders - Continuing operations - basic (in dollars per share) $ (0.02) $ (0.12)
Earnings (loss) per share attributable to common shareholders - Discontinued operations - basic (in dollars per share) 0.03 0.05
Earnings (loss) per share attributable to common shareholders - basic (in dollars per share) 0.01 (0.07)
Earnings (loss) per share attributable to common shareholders - Continuing operations - diluted (in dollars per share) (0.02) (0.12)
Earnings (loss) per share attributable to common shareholders - Discontinued operations - diluted (in dollars per share) 0.03 0.05
Earnings (loss) per share attributable to common shareholders - diluted (in dollars per share) $ 0.01 $ (0.07)
Weighted-average shares outstanding    
- basic (in shares) 14,974,663 15,240,614
- diluted (in shares) 15,244,146 15,578,309