CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($)	May 31, 2016	May 31, 2015
Allowance for doubtful accounts (in Dollars)	$ 8,405	$ 17,468
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	8,169,673	7,566,714
Common stock, shares outstanding	8,169,673	7,566,714