Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenue
Products sales and leasing	$ 9,784,308	$ 8,753,987	$ 23,173,987	$ 17,623,720
Shipping and installation revenue	2,077,943	1,223,599	5,572,877	2,636,746
Royalties	533,750	425,831	1,344,240	1,240,641
Total revenue	12,396,001	10,403,417	30,091,104	21,501,107
Cost of goods sold	8,273,621	7,280,467	22,621,805	16,180,592
Gross profit	4,122,380	3,122,950	7,469,299	5,320,515
Operating expenses
General and administrative expenses	966,702	808,216	2,698,129	2,429,280
Selling expenses	501,269	558,212	1,629,771	1,576,986
Total operating expenses	1,467,971	1,366,428	4,327,900	4,006,266
Gain on sale of assets	7,254	4,066	21,297	15,693
Other income	33,770	9,009	51,229	23,565
Operating income (loss)	2,695,433	1,769,597	3,213,925	1,353,507
Interest income (expense)
Interest expense	(47,946)	(26,603)	(111,675)	(77,333)
Interest income	(2,180)	19,062	28,205	20,370
Total other expense	(50,126)	(7,541)	(83,470)	(56,963)
Income before income tax expense	2,645,307	1,762,056	3,130,455	1,296,544
Income tax expense (benefit)	954,000	610,000	1,110,000	424,000
Net income (loss)	$ 1,691,307	$ 1,152,056	$ 2,020,455	$ 872,544
Basic income (loss) per share (in dollars per share)	$ 0.34	$ 0.24	$ 0.41	$ 0.18
Diluted income (loss) per share (in dollars per share)	$ 0.34	$ 0.23	$ 0.41	$ 0.18
Weighted average number of common shares outstanding:
Basic (in shares)	4,924,366	4,893,548	4,924,366	4,892,977
Diluted (in shares)	4,964,965	4,945,745	4,958,473	4,943,985