Condensed Statement of Operations and Comprehensive Income (Loss) (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Net sales	$ 10,874,149	$ 9,000,060	$ 27,042,961	$ 24,859,173
Cost of goods sold	7,746,821	5,726,970	18,728,928	15,572,098
Gross profit	3,127,328	3,273,090	8,314,033	9,287,075
Operating expenses:
Selling	2,067,728	2,032,486	7,068,841	6,209,842
General and administrative	733,486	438,326	1,858,043	1,059,613
Research and development	563,881	420,475	1,484,160	1,199,067
Total	3,365,095	2,891,287	10,411,044	8,468,522
Operating income (loss)	(237,767)	381,803	(2,097,011)	818,553
Other income (expense):
Interest income	5,626	39	9,627	230
Interest expense	0	(33,051)	(48,405)	(44,763)
Other, net	36,156	(320)	34,251	(385)
Total other income (expense)	41,782	(33,332)	(4,527)	(44,918)
Income (loss) before income taxes	(195,985)	348,471	(2,101,538)	773,635
Income taxes (benefit)	3,641	2,537	24,319	21,493
Net income (loss)	$ (199,626)	$ 345,934	$ (2,125,857)	$ 752,142
Net income (loss) per share:
Basic	$ (0.01)	$ 0.02	$ (0.11)	$ 0.05
Diluted	$ (0.01)	$ 0.02	$ (0.11)	$ 0.05
Basic weighted average common and common equivalent shares	20,832,174	16,050,540	18,696,083	15,905,348
Diluted weighted average common and common equivalent shares	20,832,174	16,775,498	18,696,083	16,630,306