CONDENSED CONSOLIDATED BALANCE SHEETS (Parentheticals) (USD $)	Feb. 28, 2013	May 31, 2012
Allowance for doubtful accounts (in Dollars)	$ 112,058	$ 113,191
Accumulated depreciation and amortization (in Dollars)	$ 987,167	$ 844,684
Preferred Stock, Par Value Per Share (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 Per Share (in Dollars per share)	$ 0.08	$ 0.08
Common Stock, Shares Authorized	25,000,000	25,000,000
Common Stock, Shares Issued	7,050,214	6,952,339
Common Stock, Shares Outstanding	7,050,214	6,952,339