SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Detail) (USD $)	12 Months Ended
	May 31, 2012	May 31, 2011
Entity-Wide Revenue, Major Customer, Percentage	37.20%	22.20%
Concentration Risk, Percentage	45.60%	38.50%
Inventory, Gross (in Dollars)	$ 1,821,000	$ 1,786,000
Property, Plant and Equipment, Net (in Dollars)	584,824	567,323
Long-term Line of Credit (in Dollars)	500
Depreciation, Depletion and Amortization (in Dollars)	147,297	130,046
Amortization (in Dollars)	32,827	17,764
Research and Development Expense (in Dollars)	347,128	420,571
Advertising Expense (in Dollars)	8,000	9,000
Purchase of Raw material
Concentration Risk, Percentage	30.80%
Marketing and Distribution Rights
Finite-Lived Intangible Asset, Useful Life	18 years
Patents
Finite-Lived Intangible Asset, Useful Life	17 years
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares)	195,000	649,250
Mexico
Inventory, Gross (in Dollars)	538,000	468,000
Property, Plant and Equipment, Net (in Dollars)	$ 4,000	$ 7,500
Minimum [Member]
Property, Plant and Equipment, Useful Life	5 years
Maximum [Member]
Property, Plant and Equipment, Useful Life		10 years