CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Total
Balances, at May. 31, 2010	$ 532,866	$ 17,548,754	$ (3,513)	$ (14,015,211)	$ 4,062,896
Balances, shares (in Shares) at May. 31, 2010	6,660,839
Exercise of stock options	16,600	66,400			83,000
Exercise of stock options (in Shares)	207,500
Foreign currency translation			(947)		(947)
Compensation expense in connection with options granted		27,967			27,967
Net income				157,447	157,447
Balances, at May. 31, 2011	549,466	17,643,121	(4,460)	(13,857,764)	4,330,363
Balances, shares (in Shares) at May. 31, 2011	6,868,339
Exercise of stock options and warrants	6,720	41,070			47,790
Exercise of stock options and warrants	84,000
Foreign currency translation			(1,570)		(1,570)
Compensation expense in connection with options granted		53,616			53,616
Net income				548,435	548,435
Balances, at May. 31, 2012	$ 556,186	$ 17,737,807	$ (6,030)	$ (13,309,329)	$ 4,978,634
Balances, shares (in Shares) at May. 31, 2012	6,952,339