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Condensed Consolidated Statements of Operations (Unaudited) - USD ($)
 3 Months Ended 6 Months Ended
Aug. 31, 2020
Aug. 31, 2019
Aug. 31, 2020
Aug. 31, 2019
Income Statement [Abstract]        
Net Sales $ 3,480,641 $ 3,345,822 $ 6,909,185 $ 6,168,250
Cost of Goods Sold 1,859,675 1,798,830 3,727,486 3,316,323
Gross Profit 1,620,966 1,546,992 3,181,699 2,851,927
Operating Expenses        
Research and product development costs 423,516 321,697 834,940 658,870
Marketing and selling expenses 682,270 799,284 1,388,987 1,476,696
General and administrative costs 313,852 333,662 572,254 619,475
Total Operating Expenses 1,419,638 1,454,643 2,796,181 2,755,041
Operating Income 201,328 92,349 385,518 96,886
Interest Expense (9,287) (8,518) (17,704) (17,465)
Interest and Dividend Income 2,837 25,812 25,483 56,983
Other income 8,084 12,122 19,519 16,877
Income Before Income Taxes 202,962 121,765 412,816 153,281
Income Tax Expense 25,199 7,000 67,125 13,303
Net Income $ 177,763 $ 114,765 $ 345,691 $ 139,978
Basic Earnings Per Share $ 0.01 $ 0.01 $ 0.02 $ 0.01
Diluted Earnings Per Share $ 0.01 $ 0.01 $ 0.02 $ 0.01
Weighted Average Shares - Basic 15,424,126 15,301,613 15,410,952 15,285,024
Weighted Average Shares - Diluted 15,533,010 15,399,163 15,530,910 15,376,906