Condensed Consolidated Statements of Operations (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Revenue
Products sales and leasing	$ 4,871,117	$ 7,505,181	$ 16,410,086	$ 19,531,551
Shipping and installation revenue	951,301	1,071,157	3,504,116	2,190,497
Royalties	311,987	419,620	980,648	1,317,496
Total revenue	6,134,405	8,995,958	20,894,850	23,039,544
Cost of goods sold	5,479,018	6,169,371	16,893,184	16,100,316
Gross profit	655,387	2,826,587	4,001,666	6,939,228
Operating expenses
General and administrative expenses	630,075	668,727	2,121,758	1,892,485
Selling expenses	636,651	699,421	1,831,239	1,880,921
Total operating expenses	1,266,726	1,368,148	3,952,997	3,773,406
Operating income (loss)	(611,339)	1,458,439	48,669	3,165,822
Other income (expense)
Interest expense	(36,962)	(38,104)	(109,284)	(126,603)
Interest income	2,565	1,393	11,439	17,924
Gain on sale of assets	2,316	2,321	22,470	6,988
Other, net	12,532	438	86,254	(191)
Total other income (expense)	(19,549)	(33,952)	10,879	(101,882)
Income (loss) before income tax expense	(630,888)	1,424,487	59,548	3,063,940
Income tax benefit (expense)	161,000	(523,000)	(87,000)	(1,151,000)
Net income (loss)	$ (469,888)	$ 901,487	$ (27,452)	$ 1,912,940
Basic earnings (loss) per share	$ (0.10)	$ 0.19	$ (0.01)	$ 0.41
Diluted earnings per share	$ (0.10)	$ 0.19	$ (0.01)	$ 0.40
Weighted average number of common shares outstanding:
Basic	4,826,182	4,702,882	4,778,441	4,702,882
Diluted	4,826,182	4,792,796	4,778,441	4,802,516