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Condensed Consolidated Statements of Operations (Unaudited) - USD ($)
3 Months Ended 6 Months Ended
Aug. 31, 2019
Aug. 31, 2018
Aug. 31, 2019
Aug. 31, 2018
Income Statement [Abstract]        
Net Sales $ 3,345,822 $ 2,817,731 $ 6,168,250 $ 5,518,591
Cost of Goods Sold 1,798,830 1,473,286 3,316,323 2,902,949
Gross Profit 1,546,992 1,344,445 2,851,927 2,615,642
Operating Expenses        
Research and product development costs 321,697 319,898 658,870 653,764
Marketing and selling expenses 799,284 696,913 1,476,696 1,326,701
General and administrative costs 333,662 313,808 619,475 589,200
Total Operating Expenses 1,454,643 1,330,619 2,755,041 2,569,665
Operating Income 92,349 13,826 96,886 45,977
Interest Expense (8,518) (10,203) (17,465) (20,817)
Interest and Dividend Income 25,812 36,916 56,983 71,522
Realized gain (loss) on sale of marketable securities 89,683 119,075
Net unrealized loss on marketable securities (80,596) (129,657)
Other income (expense) 12,122 16,995 16,877 19,515
Income Before Income Taxes 121,765 66,621 153,281 105,615
Income Tax Expense 7,000 7,497 13,303 25,061
Net Income $ 114,765 $ 59,124 $ 139,978 $ 80,554
Basic Earnings Per Share $ 0.01 $ 0.00 $ 0.01 $ 0.01
Diluted Earnings Per Share $ 0.01 $ 0.00 $ 0.01 $ 0.01
Weighted Average Shares - Basic 15,301,613 15,085,660 15,285,024 15,036,644
Weighted Average Shares - Diluted 15,399,163 15,224,221 15,376,906 15,169,210