Condensed Consolidated Statements of Operations (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenue
Products sales and leasing	$ 5,809,880	$ 4,871,117	$ 14,822,692	$ 16,410,086
Shipping and installation revenue	1,456,430	951,301	4,257,825	3,504,116
Royalties	278,146	311,987	1,091,518	980,648
Total revenue	7,544,456	6,134,405	20,172,035	20,894,850
Cost of goods sold	5,479,602	5,479,018	15,285,188	16,893,184
Gross profit	2,064,854	655,387	4,886,847	4,001,666
Operating expenses
General and administrative expenses	616,514	630,075	1,825,329	2,121,758
Selling expenses	474,913	636,651	1,606,609	1,831,239
Total operating expenses	1,091,427	1,266,726	3,431,938	3,952,997
Gain (Loss) on Sale of Property Plant Equipment	31,094	2,316	82,065	22,470
Other	11,750	12,532	14,630	86,254
Operating income (loss)	1,016,271	(596,491)	1,551,604	157,393
Other income (expense)
Interest expense	(33,757)	(36,962)	(101,808)	(109,284)
Interest income	1,010	2,565	3,890	11,439
Total other income (expense)	(32,747)	(34,397)	(97,918)	(97,845)
Income (loss) before income tax expense	983,524	(630,888)	1,453,686	59,548
Income tax benefit (expense)	(295,000)	161,000	(469,000)	(87,000)
Net income (loss)	$ 688,524	$ (469,888)	$ 984,686	$ (27,452)
Basic earnings (loss) per share	$ 0.14	$ (0.10)	$ 0.20	$ (0.01)
Diluted earnings per share	$ 0.14	$ (0.10)	$ 0.20	$ (0.01)
Weighted average number of common shares outstanding:
Basic	4,826,182	4,826,182	4,826,182	4,778,441
Diluted	4,859,097	4,826,182	4,861,777	4,778,441