Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Nov. 30, 2012	Nov. 30, 2011	Nov. 30, 2012	Nov. 30, 2011
Income Statement [Abstract]
Net Sales	$ 2,202,406	$ 2,944,772	$ 7,433,215	$ 9,083,801
Cost of Goods Sold	1,120,772	1,438,652	3,836,511	4,466,134
Gross Profit	1,081,634	1,506,120	3,596,704	4,617,667
Operating Expenses
Research and product development costs	212,993	277,269	699,780	817,212
Marketing and selling expenses	503,619	665,988	1,709,342	1,814,240
General and administrative costs	288,854	301,923	963,242	928,962
Real estate operations expense	28,807	36,535	86,437	100,328
Total Operating Expenses	1,034,273	1,281,715	3,458,801	3,660,742
Operating Income	47,361	224,405	137,903	956,925
Interest Expense	(28,364)	(29,528)	(86,012)	(88,895)
Interest Income	19,873	1,694	18,168	4,914
Income Before Income Taxes	38,870	196,571	70,059	872,944
Income Tax Expense (Benefit)	13,605	768	(26,042)	1,021
Net Income	$ 25,265	$ 195,803	$ 96,101	$ 871,923
Basic Earnings Per Share	$ 0.00	$ 0.01	$ 0.01	$ 0.06
Diluted Earnings Per Share	$ 0.00	$ 0.01	$ 0.01	$ 0.06
Weighted Average Shares - Basic	14,500,592	14,442,211	14,478,044	14,441,743
Weighted Average Shares - Diluted	14,576,211	14,483,245	14,581,386	14,540,733