Condensed Consolidated Statements of Operations (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Revenue
Products sales and leasing	$ 4,064,115	$ 6,071,359
Shipping and installation revenue	1,542,738	1,212,882
Royalties	383,571	331,146
Total revenue	5,990,424	7,615,387
Cost of goods sold	4,974,567	6,021,439
Gross profit	1,015,857	1,593,948
Operating expenses
General and administrative expenses	658,270	766,023
Selling expenses	617,106	560,306
Total operating expenses	1,275,376	1,326,329
Gain (Loss) on Sale of Property Plant Equipment	58,255	2,837
Other	9,792	50,041
Operating income (loss)	(191,472)	320,497
Other income (expense)
Interest expense	(35,251)	(34,778)
Interest income	1,348	5,173
Total other income (expense)	(33,903)	(29,605)
Income (loss) before income tax expense	(225,375)	290,892
Income tax benefit (expense)	(98,000)	103,000
Net income (loss)	$ (127,375)	$ 187,892
Basic earnings (loss) per share	$ (0.03)	$ 0.04
Diluted earnings per share	$ (0.03)	$ 0.04
Weighted average number of common shares outstanding:
Basic	4,826,182	4,704,182
Diluted	4,826,182	4,863,818