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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($)
12 Months Ended
May. 31, 2015
May. 31, 2014
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]    
Property, Plant and Equipment, Net $ 445,386 $ 614,337
Threshold Period Past Due for Write-off of Trade Accounts Receivable 90 days  
Inventory Valuation Reserves $ 25,000 43,000
Depreciation, Depletion and Amortization 178,219 177,518
Amortization of Intangible Assets 75,056 29,515
Revenue Recognition, Sales Returns, Reserve for Sales Returns 0 0
Research and Development Expense 733,640 589,866
Advertising Expense $ 6,000 $ 8,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares) 1,148,000 860,500
Domestic Customer [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]    
Accounts Receivable Initial Credit Limit $ 500  
MEXICO    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]    
Inventory, Gross 530,000 $ 443,000
Property, Plant and Equipment, Net $ 35,000 $ 43,000
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]    
Concentration Risk, Percentage 16.30% 23.40%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Two Customers [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]    
Concentration Risk, Percentage 53.00% 60.50%
Cost of Goods, Product Line [Member] | Supplier Concentration Risk [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]    
Concentration Risk, Percentage 13.60% 30.20%
Investment In Polish Distributor [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]    
Equity Method Investment, Ownership Percentage 6.00%  
Minimum [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]    
Property, Plant and Equipment, Useful Life 5 years  
Maximum [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]    
Property, Plant and Equipment, Useful Life 10 years  
Maximum [Member] | Marketing-Related Intangible Assets [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]    
Finite-Lived Intangible Asset, Useful Life 18 years  
Maximum [Member] | Patents [Member]    
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) [Line Items]    
Finite-Lived Intangible Asset, Useful Life 17 years