Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended
	May 31, 2012	May 31, 2011
Income Statement [Abstract]
Net Sales	$ 2,839,702	$ 2,989,070
Cost of Goods Sold	1,490,004	1,555,971
Gross Profit	1,349,698	1,433,099
Operating Expenses
Research and product development costs	254,070	255,059
Marketing and selling expenses	652,912	567,632
General and administrative costs	358,546	303,184
Rental operations expense	29,020	39,829
Total Operating Expenses	1,294,548	1,165,704
Operating Income	55,150	267,395
Interest Expense	(28,970)	(29,773)
Interest Income	(7,940)	246
Income from Operations Before Income Taxes	18,240	237,868
Income Tax (Benefit) Expense	7,140	(727)
Net Income	$ 11,100	$ 238,595
Basic Earnings Per Share	$ 0.00	$ 0.02
Diluted Earnings Per Share	$ 0.00	$ 0.02
Weighted Average Shares - Basic	14,459,579	14,441,511
Weighted Average Shares - Diluted	14,570,514	14,752,316