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Consolidated Statements of Income and Comprehensive Income (Loss) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenues:                      
Revenues $ 10,261,534 $ 9,250,689 $ 9,598,177 $ 8,330,734 $ 9,305,553 $ 6,935,439 $ 9,417,443 $ 8,729,860 $ 37,441,134 $ 34,388,295 $ 29,344,894
Costs and expenses:                      
Cost of products sold                 8,653,020 7,421,316 6,016,822
Selling and marketing                 14,765,465 15,277,740 14,004,933
Research and development                 5,773,825 6,868,480 7,575,892
General and administrative                 10,196,299 9,974,384 10,150,777
Amortization                 4,434,120 4,134,557 2,769,466
Total costs and expenses                 43,822,729 43,676,477 40,517,890
Operating income (loss) (1,745,946) (1,208,686) (1,580,962) (1,846,001) (3,394,390) (3,196,436) (1,373,424) (1,323,932) (6,381,595) (9,288,182) (11,172,996)
Interest income                 75,345 243,364 564,484
Interest expense                 (263,627) (246,186) (195,848)
Income (loss) before income taxes                 (6,569,877) (9,291,004) (10,804,360)
Income tax (expense) benefit                 (55,902) 79,316 (16,636)
Net income (loss) from continuing operations (1,787,530) (1,275,620) (1,679,211) (1,883,418) (3,369,329) (3,316,286) (1,338,521) (1,187,553) (6,625,779) (9,211,688) (10,820,996)
Discontinued operations net of tax 872,064 777,916 738,622 818,273 2,396,981 1,349,351 771,709 1,147,136 3,206,875 5,665,177 3,782,224
Net income (loss)                 (3,418,904) (3,546,511) (7,038,772)
Net loss at subsidiary attributable to noncontrolling interests                 79,496 8,752 75,704
Net income (loss) attributable to common shareholders $ (883,776) $ (481,737) $ (918,275) $ (1,055,620) $ (960,706) $ (1,953,668) $ (549,507) $ (73,878) $ (3,339,408) $ (3,537,759) $ (6,963,068)
Earnings (loss) per share attributable to common shareholders:                      
-Continuing operations-basic $ (0.12) $ (0.08) $ (0.11) $ (0.12) $ (0.22) $ (0.22) $ (0.09) $ (0.08) $ (0.43) $ (0.60) $ (0.69)
-Discontinued operations-basic 0.06 0.05 0.05 0.05 0.16 0.09 0.05 0.08 0.21 0.37 0.24
Basic (in USD per share) (0.06) (0.03) (0.06) (0.07) (0.06) (0.13) (0.04) 0 (0.22) (0.23) (0.45)
-Continuing operations-diluted (0.12) (0.08) (0.11) (0.12) (0.22) (0.22) (0.09) (0.08) (0.43) (0.60) (0.69)
-Discontinued operations-diluted 0.06 0.05 0.05 0.05 0.16 0.09 0.05 0.08 0.21 0.37 0.24
Diluted (in USD per share) $ (0.06) $ (0.03) $ (0.06) $ (0.07) $ (0.06) $ (0.13) $ (0.04) $ 0 $ (0.22) $ (0.23) $ (0.45)
Weighted-average common shares outstanding:                      
Basic (in shares)                 15,162,184 15,396,098 15,614,052
Diluted (in shares)                 15,162,184 15,396,098 15,614,052
Product                      
Revenues:                      
Revenues                 $ 35,840,673 $ 32,407,845 $ 28,803,961
Other                      
Revenues:                      
Revenues                 $ 1,600,461 $ 1,980,450 $ 540,933