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Condensed Consolidated Statements of Income (Unaudited) (USD $)
 3 Months Ended 6 Months Ended
Aug. 31, 2014
Aug. 31, 2013
Aug. 31, 2014
Aug. 31, 2013
Income Statement [Abstract]        
Net Sales $ 2,633,727 $ 2,537,378 $ 5,054,426 $ 4,911,772
Cost of Goods Sold 1,331,640 1,295,146 2,604,373 2,528,126
Gross Profit 1,302,087 1,242,232 2,450,053 2,383,646
Operating Expenses        
Research and product development costs 254,983 231,642 490,830 457,236
Marketing and selling expenses 553,846 499,616 1,097,694 988,625
General and administrative costs 251,680 253,505 493,264 522,595
Rental operations expense 42,414 35,618 81,574 70,100
Total Operating Expenses 1,102,923 1,020,381 2,163,362 2,038,556
Operating Income 199,164 221,851 286,691 345,090
Interest Expense (16,275) (27,649) (32,310) (55,244)
Other (expense) income 5,675 (21,865) 15,975 (23,573)
Income form Operations Before Income Taxes 188,564 172,337 270,356 266,273
Income Tax Expense 73,540 66,908 88,689 87,096
Net Income $ 115,024 $ 105,429 $ 181,667 $ 179,177
Basic Earnings Per Share $ 0.01 $ 0.01 $ 0.01 $ 0.01
Diluted Earnings Per Share $ 0.01 $ 0.01 $ 0.01 $ 0.01
Weighted Average Shares - Basic 14,713,788 14,503,070 14,711,770 14,503,040
Weighted Average Shares - Diluted 14,876,819 14,604,147 14,859,769 14,558,306