Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue
Products sales and leasing	$ 8,753,987	$ 4,558,745	$ 17,623,720	$ 13,295,450
Shipping and installation revenue	1,223,599	1,072,529	2,636,746	3,580,769
Royalties	425,831	343,821	1,240,641	1,164,600
Total revenue	10,403,417	5,975,095	21,501,107	18,040,819
Cost of goods sold	7,280,467	4,454,689	16,180,592	14,385,001
Gross profit	3,122,950	1,520,406	5,320,515	3,655,818
Operating expenses
General and administrative expenses	808,216	761,907	2,429,280	2,337,909
Selling expenses	558,212	549,134	1,576,986	1,635,503
Total operating expenses	1,366,428	1,311,041	4,006,266	3,973,412
Gain on sale of assets	4,066	4,352	15,693	38,431
Other income	9,009	3,055	23,565	55,728
Operating income (loss)	1,769,597	216,772	1,353,507	(223,435)
Interest income (expense)
Interest expense	(26,603)	(28,993)	(77,333)	(87,597)
Interest income	19,062	(289)	20,370	6,967
Total other expense	(7,541)	(29,282)	(56,963)	(80,630)
Income before income tax expense	1,762,056	187,490	1,296,544	(304,065)
Income tax expense (benefit)	610,000	75,000	424,000	(118,000)
Net income (loss)	$ 1,152,056	$ 112,490	$ 872,544	$ (186,065)
Basic earnings (loss) per share (in dollars per share)	$ 0.24	$ 0.02	$ 0.18	$ (0.04)
Diluted earnings (loss) per share (in dollars per share)	$ 0.23	$ 0.02	$ 0.18	$ (0.04)
Weighted average number of common shares outstanding:
Basic (in shares)	4,893,548	4,881,548	4,892,977	4,881,548
Diluted (in shares)	4,945,745	4,925,064	4,943,985	4,881,548