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Consolidated Statements of Income and Comprehensive Income (Loss) - USD ($)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Revenues:      
Revenues $ 34,388,295 $ 29,344,894 $ 26,322,627
Costs and expenses:      
Cost of products sold 7,421,316 6,016,822 5,418,010
Selling and marketing 15,277,740 14,004,933 13,489,178
Research and development 6,868,480 7,575,892 4,247,623
General and administrative 9,974,384 10,150,777 9,610,967
Amortization 4,134,557 2,769,466 2,436,222
Total costs and expenses 43,676,477 40,517,890 35,202,000
Operating income (loss) (9,288,182) (11,172,996) (8,879,373)
Interest income 243,364 564,484 299,326
Interest expense (246,186) (195,848) (92,904)
Income (loss) before income taxes (9,291,004) (10,804,360) (8,672,951)
Income tax (expense) benefit 79,316 (16,636) (4,174,889)
Net income (loss) from continuing operations (9,211,688) (10,820,996) (12,847,840)
Discontinued operations net of tax 5,665,177 3,782,224 4,798,025
Net income (loss) (3,546,511) (7,038,772) (8,049,815)
Net loss at subsidiary attributable to noncontrolling interests 8,752 75,704 71,182
Net income (loss) attributable to common shareholders $ (3,537,759) $ (6,963,068) $ (7,978,633)
Earnings (loss) per share attributable to common shareholders:      
Earnings (loss) per share attributable to common shareholders-Continuing operations-basic (in USD per share) $ (0.60) $ (0.70) $ (0.80)
Earnings (loss) per share attributable to common shareholders-Discontinued operations-basic (in USD per share) 0.37 0.25 0.30
Basic (in USD per share) (0.23) (0.45) (0.50)
Earnings (loss) per share attributable to common shareholders-Continuing operations-diluted (in USD per share) (0.60) (0.70) (0.80)
Earnings (loss) per share attributable to common shareholders-Discontinued operations-diluted (in USD per share) 0.37 0.25 0.30
Diluted (in USD per share) $ (0.23) $ (0.45) $ (0.50)
Weighted-average common shares outstanding:      
Basic (in shares) 15,396,098 15,614,052 15,911,577
Diluted (in shares) 15,396,098 15,614,052 15,911,577
Comprehensive income (loss) attributable to common shareholders $ (3,537,759) $ (6,963,068) $ (7,978,633)
Net loss at subsidiary attributable to noncontrolling interests 8,752 75,704 71,182
Total comprehensive income (loss) (3,546,511) (7,038,772)  
Product      
Revenues:      
Revenues 32,407,245 28,803,961 25,549,059
Other      
Revenues:      
Revenues $ 1,981,050 $ 540,933 $ 773,568