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Significant Accounting Policies (Details) - USD ($)
3 Months Ended 12 Months Ended
Aug. 31, 2018
Aug. 31, 2017
May 31, 2018
Significant Accounting Policies (Details) [Line Items]      
Threshold Period Past Due for Write-off of Trade Accounts Receivable 90 days    
Inventory Valuation Reserves $ 52,000   $ 52,000
Depreciation, Depletion and Amortization 27,295 $ 31,222  
Amortization of Intangible Assets $ 16,665 17,611  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in Shares) 21,500    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit (in Dollars per share) $ 0.83    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit (in Dollars per share) $ 0.85    
Proceeds from Stock Options Exercised $ 17,875 $ 1,038  
Revenue Recognition, Sales Returns, Reserve for Sales Returns 0   0
Deferred Tax Assets, Valuation Allowance $ 1,640,000   $ 1,549,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares) 1,113,625 945,000  
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    
Investment In Polish Distributor [Member]      
Significant Accounting Policies (Details) [Line Items]      
Equity Method Investment, Ownership Percentage 6.00%    
Marketing-Related Intangible Assets [Member] | Maximum [Member]      
Significant Accounting Policies (Details) [Line Items]      
Finite-Lived Intangible Asset, Useful Life 18 years    
Purchased Technology Rights [Member] | Maximum [Member]      
Significant Accounting Policies (Details) [Line Items]      
Finite-Lived Intangible Asset, Useful Life 10 years    
Patents [Member] | Maximum [Member]      
Significant Accounting Policies (Details) [Line Items]      
Finite-Lived Intangible Asset, Useful Life 17 years    
Domestic Customer [Member]      
Significant Accounting Policies (Details) [Line Items]      
Accounts Receivable Initial Credit Limit $ 500    
Credit Concentration Risk [Member] | Accounts Receivable [Member]      
Significant Accounting Policies (Details) [Line Items]      
Concentration Risk, Percentage 53.80%   53.30%
Customer Concentration Risk [Member] | Sales Revenue, Net [Member]      
Significant Accounting Policies (Details) [Line Items]      
Concentration Risk, Percentage 45.50% 41.80%  
Supplier Concentration Risk [Member] | Cost of Goods, Product Line [Member]      
Significant Accounting Policies (Details) [Line Items]      
Concentration Risk, Percentage 21.30% 20.60%