Quarterly report pursuant to Section 13 or 15(d)

BALANCE SHEETS (PARENTHETICAL)

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BALANCE SHEETS (PARENTHETICAL) - USD ($)
May. 31, 2015
Feb. 28, 2015
BALANCE SHEETS [Abstract]    
Accounts receivable, allowance for doubtful accounts $ 31,581 $ 29,865
Patents, accumulated amortization $ 137,390 $ 134,552
Common stock, par value per share $ 0.01 $ 0.01
Common stock, shares authorized 50,000,000 50,000,000
Common stock, shares issued 40,347,292 40,347,292
Common stock, shares outstanding 38,006,667 38,006,667
Treasury stock, shares 2,340,625 2,340,625