Condensed Consolidated Statements of Income (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2020	Nov. 30, 2019
Income Statement [Abstract]
Net Sales	$ 3,827,142	$ 3,672,286	$ 10,736,327	$ 9,840,536
Cost of Goods Sold	1,896,516	1,875,606	5,624,002	5,191,929
Gross Profit	1,930,626	1,796,680	5,112,325	4,648,607
Operating Expenses
Research and product development costs	406,799	361,429	1,241,739	1,020,299
Marketing and selling expenses	765,969	849,419	2,154,956	2,326,115
General and administrative costs	311,130	316,218	883,384	935,693
Total Operating Expenses	1,483,898	1,527,066	4,280,079	4,282,107
Operating Income	446,728	269,614	832,246	366,500
Interest Expense	(6,245)	(8,000)	(23,949)	(25,465)
Interest and Dividend Income	1,470	20,513	26,953	77,496
Other income	10,824	7,527	30,343	24,404
Income Before Income Taxes	452,777	289,654	865,593	442,935
Income Tax Expense	132,299	10,000	199,424	23,303
Net Income	$ 320,478	$ 279,654	$ 666,169	$ 419,632
Basic Earnings Per Share	$ 0.02	$ 0.02	$ 0.04	$ 0.03
Diluted Earnings Per Share	$ 0.02	$ 0.02	$ 0.04	$ 0.03
Weighted Average Shares - Basic	15,440,673	15,306,008	15,420,787	15,291,968
Weighted Average Shares - Diluted	15,583,089	15,371,819	15,547,604	15,354,472