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, 2011	$ 549,466	$ 17,643,121	$ (4,460)	$ (13,857,764)	$ 4,330,363
Balances (in Shares) at May. 31, 2011	6,868,339
Exercise of stock options	6,720	41,070			47,790
Exercise of stock options (in Shares)	84,000				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 (in Shares) at May. 31, 2012	6,952,339
Exercise of stock options	9,790	41,724			51,514
Exercise of stock options (in Shares)	122,375				122,375
Foreign currency translation			(2,976)		(2,976)
Sale of shares of common stock	16,000	234,000			250,000
Sale of shares of common stock (in Shares)	200,000				200,000
Compensation expense in connection with options granted		20,865			20,865
Net income				536,957	536,957
Balances at May. 31, 2013	$ 581,976	$ 18,034,396	$ (9,006)	$ (12,772,372)	$ 5,834,994
Balances (in Shares) at May. 31, 2013	7,274,714