Consolidated Statements of Income (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Revenue
Products sales and leasing	$ 21,897,695	$ 18,353,442
Shipping and installation revenue	4,267,469	5,179,446
Royalties	1,545,378	1,360,725
Total revenue	27,710,542	24,893,613
Cost of goods sold	21,138,628	19,447,119
Gross profit	6,571,914	5,446,494
General and administrative expenses	3,088,403	2,662,862
Selling expenses	2,322,837	2,205,043
Total operating expenses	5,411,240	4,867,905
Gain on sale of assets	61,634	110,175
Other	57,362	(1,002)
Operating income	1,279,670	687,762
Other income (expense)
Interest expense	(132,026)	(134,828)
Interest income	3,538	5,757
Loss on investment securities available-for-sale	(68,680)	0
Total other expense	(197,168)	(129,071)
Income before income tax expense	1,082,502	558,691
Income tax expense	391,000	182,000
Net income	$ 691,502	$ 376,691
Basic earnings per share (in dollars per share)	$ 0.14	$ 0.08
Diluted earnings per share (in dollars per share)	$ 0.14	$ 0.08