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Condensed Consolidated Statements of Operations - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Income Statement [Abstract]        
Net revenues $ 8,072,540 $ 9,250,689 $ 27,665,182 $ 27,179,600
Costs and expenses:        
Cost of products sold 1,328,027 2,142,839 5,486,005 6,387,002
Selling and marketing 3,800,288 3,587,842 11,709,445 11,160,924
Research and development 1,453,873 1,230,335 4,071,638 4,374,392
General and administrative 2,039,799 2,381,273 6,367,438 6,608,321
Amortization 1,013,948 1,117,086 3,354,080 3,284,610
Total costs and expenses 9,635,935 10,459,375 30,988,606 31,815,249
Operating income (loss) (1,563,395) (1,208,686) (3,323,424) (4,635,649)
Interest income 7,394 12,004 19,411 70,553
Other income 0 0 2,187,140 0
Interest expense (20,021) (75,210) (70,297) (227,730)
Income (loss) from continuing operations before income taxes (1,576,022) (1,271,892) (1,187,170) (4,792,826)
Income tax (expense) benefit (7,458) (3,728) (22,375) (45,423)
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total (1,583,480) (1,275,620) (1,209,545) (4,838,249)
Discontinued operations     1,491,004 2,334,811
Net income (loss) (1,086,693) (497,704) 281,459 (2,503,438)
Net (income) loss at subsidiary attributable to noncontrolling interests 31,415 15,967 58,651 47,806
Net income (loss) attributable to common shareholders $ (1,055,278) $ (481,737) $ 340,110 $ (2,455,632)
Earnings (loss) per share attributable to common shareholders        
Earnings (loss) per share attributable to common shareholders - Continuing operations - basic (in dollars per share) $ (0.10) $ (0.08) $ (0.08) $ (0.31)
Earnings (loss) per share attributable to common shareholders - Discontinued operations - basic (in dollars per share) 0.03 0.05 0.10 0.15
Earnings (loss) per share attributable to common shareholders - basic (in dollars per share) (0.07) (0.03) 0.02 (0.16)
Earnings (loss) per share attributable to common shareholders - Continuing operations - diluted (in dollars per share) (0.10) (0.08) (0.08) (0.31)
Earnings (loss) per share attributable to common shareholders - Discontinued operations - diluted (in dollars per share) 0.03 0.05 0.10 0.15
Earnings (loss) per share attributable to common shareholders - diluted (in dollars per share) $ (0.07) $ (0.03) $ 0.02 $ (0.16)
Weighted-average shares outstanding        
- basic (in shares) 14,880,887 15,134,583 14,939,919 15,206,179
- diluted (in shares) 14,880,887 15,134,583 15,139,904 15,206,179