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Significant Accounting Policies (Details) - USD ($)
3 Months Ended 12 Months Ended
Aug. 31, 2017
Aug. 31, 2016
May 31, 2017
Significant Accounting Policies (Details) [Line Items]      
Accounts Receivable Initial Credit Limit $ 500    
Threshold Period Past Due for Write-off of Trade Accounts Receivable 90 days    
Inventory Valuation Reserves $ 35,000   $ 35,000
Depreciation, Depletion and Amortization 31,222 $ 36,971  
Amortization of Intangible Assets $ 17,611 $ 16,007  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares) 52,000    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share) $ 2.41    
Revenue Recognition, Sales Returns, Reserve for Sales Returns $ 0   0
Deferred Tax Assets, Valuation Allowance $ 1,508,000   $ 1,435,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares) 945,000 1,249,000  
Minimum [Member]      
Significant Accounting Policies (Details) [Line Items]      
Property, Plant and Equipment, Useful Life 5 years    
Maximum [Member]      
Significant Accounting Policies (Details) [Line Items]      
Property, Plant and Equipment, Useful Life 10 years    
Maximum [Member] | Marketing-Related Intangible Assets [Member]      
Significant Accounting Policies (Details) [Line Items]      
Finite-Lived Intangible Asset, Useful Life 18 years    
Maximum [Member] | Purchased Technology Rights [Member]      
Significant Accounting Policies (Details) [Line Items]      
Finite-Lived Intangible Asset, Useful Life 10 years    
Maximum [Member] | Patents [Member]      
Significant Accounting Policies (Details) [Line Items]      
Finite-Lived Intangible Asset, Useful Life 17 years    
Investment In Polish Distributor [Member]      
Significant Accounting Policies (Details) [Line Items]      
Equity Method Investment, Ownership Percentage 6.00%    
Accounts Receivable [Member] | Credit Concentration Risk [Member]      
Significant Accounting Policies (Details) [Line Items]      
Concentration Risk, Percentage 50.50%   54.20%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]      
Significant Accounting Policies (Details) [Line Items]      
Concentration Risk, Percentage 41.80% 40.50%