Unaudited Condensed Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Sales	$ 14,971,681	$ 13,013,143	$ 28,276,779	$ 24,265,560
Cost of goods sold	8,370,160	6,891,619	15,481,087	12,855,577
Gross profit	6,601,521	6,121,524	12,795,692	11,409,983
Operating expenses:
Research and development	2,418,325	1,819,288	4,687,439	3,416,087
Sales and marketing	4,094,828	1,792,010	6,979,213	3,420,151
General and administrative	3,737,654	2,637,380	5,941,994	4,275,419
Total operating expenses	10,250,807	6,248,678	17,608,646	11,111,657
Income (loss) from operations	(3,649,286)	(127,154)	(4,812,954)	298,326
Other expense (income):
Interest income	(128,781)	(53,965)	(239,212)	(91,166)
Gain on deferred purchase price liability	(388,733)		(388,733)
Interest expense	9,846	26,713	23,750	57,477
Total other income	(507,668)	(27,252)	(604,195)	(33,689)
Income (loss) before income taxes	(3,141,618)	(99,902)	(4,208,759)	332,015
Provision (benefit) for income taxes	48,729	(29,781)	87,379	17,045
Net income (loss)	$ (3,190,347)	$ (70,121)	$ (4,296,138)	$ 314,970
Net income (loss) per share:
Basic	$ (0.34)	$ (0.01)	$ (0.45)	$ 0.03
Diluted	$ (0.34)	$ (0.01)	$ (0.45)	$ 0.03
Weighted average shares used in calculating income (loss) per share:
Basic	9,439,025	9,520,285	9,459,272	9,440,368
Diluted	9,439,025	9,520,285	9,459,272	10,120,998