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CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($)
May. 31, 2015
May. 31, 2014
Allowance for doubtful accounts (in Dollars) $ 17,468 $ 30,000
Preferred Stock, No Par Value (in Dollars per share) $ 0 $ 0
Preferred Stock, Shares Authorized 5,000,000 5,000,000
Preferred Stock, Shares Issued 0 0
Preferred Stock, Shares Outstanding 0 0
Common stock par value (in Dollars per share) $ 0.08 $ 0.08
Common stock, shares authorized 25,000,000 25,000,000
Common stock, shares issued 7,566,714 7,543,714
Common stock, shares outstanding 7,566,714 7,543,714