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Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Net revenues	$ 10,163,724	$ 8,667,127	$ 18,751,329	$ 18,303,882
Costs and expenses:
Cost of products sold	1,523,319	1,668,926	3,051,280	3,050,423
Selling and marketing	5,076,250	4,654,933	9,746,761	9,947,953
Research and development	1,450,390	1,080,426	3,325,329	1,978,789
General and administrative	2,334,223	2,353,140	4,664,504	4,463,373
Amortization	648,520	590,573	1,284,655	1,202,017
Total costs and expenses	11,032,702	10,347,998	22,072,529	20,642,555
Operating income (loss)	(868,978)	(1,680,871)	(3,321,200)	(2,338,673)
Interest income	149,706	69,481	232,200	122,016
Interest expense	(22,019)	(30,029)	(40,321)	(61,744)
Income (loss) before income taxes	(741,291)	(1,641,419)	(3,129,321)	(2,278,401)
Income tax (expense) benefit	(4,159)	(3,535,783)	(8,318)	(4,192,370)
Net income (loss)	(745,450)	(5,177,202)	(3,137,639)	(6,470,771)
Net loss at subsidiary attributable to noncontrolling interests	24,762	16,591	37,712	35,714
Net income (loss) attributable to common shareholders	$ (720,688)	$ (5,160,611)	$ (3,099,927)	$ (6,435,057)
Earnings (loss) per share attributable to common shareholders
- basic (in dollars per share)	$ (0.05)	$ (0.32)	$ (0.20)	$ (0.40)
- diluted (in dollars per share)	$ (0.05)	$ (0.32)	$ (0.20)	$ (0.40)
Weighted-average shares outstanding
- basic (in shares)	15,674,954	16,011,758	15,682,348	16,026,935
- diluted (in shares)	15,674,954	16,011,758	15,682,348	16,026,935
Comprehensive income (loss) attributable to common shareholders	$ (720,688)	$ (5,160,611)	$ (3,099,927)	$ (6,435,057)
Net loss at subsidiary attributable to noncontrolling interests	24,762	16,591	37,712	35,714
Total comprehensive income (loss)	$ (745,450)	$ (5,177,202)	$ (3,137,639)	$ (6,470,771)

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
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X

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=96947427&loc=d3e1448-109256

+ Details

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Balance Type:	na
Period Type:	duration