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Unaudited Condensed Statements of Operations - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Sales	$ 13,305,098	$ 11,252,417
Cost of goods sold	7,110,927	5,963,959
Gross profit	6,194,171	5,288,458
Operating expenses:
Research and development	2,269,114	1,596,799
Sales and marketing	2,884,386	1,628,141
General and administrative	2,204,340	1,638,039
Total operating expenses	7,357,840	4,862,979
Income (loss) from operations	(1,163,669)	425,479
Other expense (income):
Interest income	(110,431)	(37,201)
Interest expense	13,904	30,764
Total other income	(96,527)	(6,437)
Income (loss) before income taxes	(1,067,142)	431,916
Provision for income taxes	38,649	46,826
Net income (loss)	$ (1,105,791)	$ 385,090
Net income (loss) per share:
Basic	$ (0.12)	$ 0.04
Diluted	$ (0.12)	$ 0.04
Weighted average shares used in calculating income (loss) per share:
Basic	9,479,742	9,359,562
Diluted	9,479,742	10,201,606

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