Condensed Consolidated Statements of Operations (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenue
Products sales and leasing	$ 4,558,745	$ 5,557,080	$ 13,295,450	$ 16,003,161
Shipping and installation revenue	1,072,529	946,159	3,580,769	2,769,227
Royalties	343,821	403,098	1,164,600	1,162,148
Total revenue	5,975,095	6,906,337	18,040,819	19,934,536
Cost of goods sold	4,454,689	5,143,337	14,385,001	15,303,534
Gross profit	1,520,406	1,763,000	3,655,818	4,631,002
Operating expenses
General and administrative expenses	761,907	711,569	2,337,909	2,175,631
Selling expenses	549,134	518,687	1,635,503	1,784,748
Total operating expenses	1,311,041	1,230,256	3,973,412	3,960,379
Gain on sale of assets	4,352	10,741	38,431	29,247
Other income	(24,826)	(58,520)	27,847	(13,039)
Operating income (loss)	188,891	484,965	(251,316)	686,831
Interest income (expense)
Interest expense	(28,993)	(39,662)	(87,597)	(98,833)
Interest income	27,592	1,606	34,848	3,067
Total other expense	(1,401)	(38,056)	(52,749)	(95,766)
Income before income tax expense	187,490	446,909	(304,065)	591,065
Income tax expense (benefit)	75,000	175,000	(118,000)	233,000
Net income (loss)	$ 112,490	$ 271,909	$ (186,065)	$ 358,065
Basic earnings (loss) per share (in dollars per share)	$ 0.02	$ 0.06	$ (0.04)	$ 0.07
Diluted earnings (loss) per share (in dollars per share)	$ 0.02	$ 0.06	$ (0.04)	$ 0.07
Weighted average number of common shares outstanding:
Basic	4,881,548	4,841,208	4,881,548	4,834,305
Diluted	4,925,064	4,906,073	4,881,548	4,899,170