Consolidated Statements of Income (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Revenue
Products sales and leasing	$ 16,609,047	$ 21,897,695
Shipping and installation revenue	4,269,157	4,267,469
Royalties	1,592,633	1,545,378
Total revenue	22,470,837	27,710,542
Cost of goods sold	18,625,035	21,138,628
Gross profit	3,845,802	6,571,914
General and administrative expenses	2,979,835	3,088,403
Selling expenses	2,218,269	2,322,837
Total operating expenses	5,198,104	5,411,240
Gain on sale of assets	(174)	61,634
Other	157,540	57,362
Operating income	(1,194,936)	1,279,670
Other income (expense)
Interest expense	(116,229)	(132,026)
Interest income	8,327	3,538
Loss on investment securities available-for-sale	0	(68,680)
Total other expense	(107,902)	(197,168)
Income before income tax expense	(1,302,838)	1,082,502
Income tax expense	(498,000)	391,000
Net income	$ (804,838)	$ 691,502
Basic earnings per share (in dollars per share)	$ (0.16)	$ 0.14
Diluted earnings per share (in dollars per share)	$ (0.16)	$ 0.14