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Condensed Consolidated Statements of Income (Unaudited) (USD $)
 3 Months Ended 9 Months Ended
Nov. 30, 2013
Nov. 30, 2012
Nov. 30, 2013
Nov. 30, 2012
Income Statement [Abstract]        
Net Sales $ 2,650,225 $ 2,202,406 $ 7,561,998 $ 7,433,215
Cost of Goods Sold 1,435,055 1,120,772 3,963,181 3,836,511
Gross Profit 1,215,170 1,081,634 3,598,817 3,596,704
Operating Expenses        
Research and product development costs 204,738 212,993 661,975 699,780
Marketing and selling expenses 462,685 503,619 1,451,310 1,709,342
General and administrative costs 225,301 288,854 747,896 963,242
Rental operations expense 48,791 28,807 118,890 86,437
Total Operating Expenses 941,515 1,034,273 2,980,071 3,458,801
Operating Income 273,655 47,361 618,746 137,903
Interest Expense (27,152) (28,364) (82,396) (86,012)
Other (expense) income 18,169 19,873 (5,405) 18,168
Income Before Income Taxes 264,672 38,870 530,945 70,059
Income Tax (Benefit) Expense 93,425 13,605 180,521 (26,042)
Net Income $ 171,247 $ 25,265 $ 350,424 $ 96,101
Basic Earnings Per Share $ 0.01 $ 0.00 $ 0.02 $ 0.01
Diluted Earnings Per Share $ 0.01 $ 0.00 $ 0.02 $ 0.01
Weighted Average Shares - Basic 14,508,507 14,500,592 14,504,836 14,478,044
Weighted Average Shares - Diluted 14,775,422 14,576,211 14,710,838 14,581,386