Balance Sheets (Parenthetical) (USD $)	May 31, 2012	May 31, 2011
ASSETS:
Accounts receivable allowance for doubtful accounts	$ 19,396	$ 19,396
Deferred income tax valuation allowance	$ 1,784,000	$ 1,721,000
Stockholders equity:
Preferred stock, par value	$ 0.02	$ 0.02
Preferred stock, liquidation value	$ 1.50	$ 1.50
Preferred stock, authorized shares	2,000,000	2,000,000
Preferred stock, issued shares	92,000	92,000
Preferred stock, outstanding shares	92,000	92,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, authorized shares	200,000,000	200,000,000
Common stock, issued shares	40,076,783	40,076,783
Common stock, outstanding shares	40,076,783	40,076,783