Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenue
Products sales and leasing	$ 5,600,996	$ 4,666,367	$ 8,869,733	$ 8,736,705
Shipping and installation revenue	813,894	1,393,336	1,413,147	2,508,240
Royalties	482,675	368,613	814,810	820,779
Total revenue	6,897,565	6,428,316	11,097,690	12,065,724
Cost of goods sold	5,229,992	5,022,910	8,900,125	9,930,312
Gross profit	1,667,573	1,405,406	2,197,565	2,135,412
Operating expenses
General and administrative expenses	746,357	806,931	1,621,064	1,576,002
Selling expenses	514,760	546,889	1,018,774	1,086,369
Total operating expenses	1,261,117	1,353,820	2,639,838	2,662,371
Gain on sale of assets	6,373	22,102	11,627	34,079
Other income	3,949	22,596	14,556	52,673
Operating income (loss)	416,778	96,284	(416,090)	(440,207)
Interest income (expense)
Interest expense	(23,737)	(29,847)	(50,730)	(58,604)
Interest income	816	1,544	1,308	7,256
Total other expense	(22,921)	(28,303)	(49,422)	(51,348)
Income before income tax expense	393,857	67,981	(465,512)	(491,555)
Income tax expense (benefit)	149,000	38,000	(186,000)	(193,000)
Net income (loss)	$ 244,857	$ 29,981	$ (279,512)	$ (298,555)
Basic earnings (loss) per share (in dollars per share)	$ 0.05	$ 0.01	$ (0.06)	$ (0.06)
Diluted earnings (loss) per share (in dollars per share)	$ 0.05	$ 0.01	$ (0.06)	$ (0.06)
Weighted average number of common shares outstanding:
Basic	4,892,686	4,881,548	4,892,686	4,881,548
Diluted	4,938,234	4,928,652	4,892,686	4,881,548