Condensed Consolidated Statements of Income (Unaudited) - USD ($)	3 Months Ended
	May 31, 2016	May 31, 2015
Income Statement [Abstract]
Net Sales	$ 2,240,211	$ 2,882,897
Cost of Goods Sold	1,216,809	1,509,766
Gross Profit	1,023,402	1,373,131
Operating Expenses
Research and product development costs	303,794	282,131
Marketing and selling expenses	546,983	571,627
General and administrative costs	269,189	256,784
Rental operations expense	43,117	39,545
Total Operating Expenses	1,163,083	1,150,087
Operating (Loss) Income	(139,681)	223,044
Interest Expense	(13,745)	(15,288)
Interest Income	17,583	13,760
Other (expense) income	201,259	(14,280)
Income Before Income Taxes	65,416	207,236
Income Tax Expense	9,625	53,214
Net Income	55,791	154,022
Other Comprehensive Loss
Net unrealized loss on marketable securities	55,941
Comprehensive Income	$ 111,732	$ 154,022
Basic Earnings Per Share	$ 0.00	$ 0.01
Diluted Earnings Per Share	$ 0.00	$ 0.01
Weighted Average Shares - Basic	14,961,076	14,833,107
Weighted Average Shares - Diluted	15,005,107	14,926,642