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Significant Accounting Policies (Details) (USD $)
3 Months Ended
Aug. 31, 2014
Aug. 31, 2013
Significant Accounting Policies (Details) [Line Items]    
Amortization of Intangible Assets $ 18,180 $ 7,456
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in Shares) 8,250  
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price (in Dollars per share) $ 0.38  
Proceeds from Stock Options Exercised 3,173 760
Equity Method Investment, Ownership Percentage 6.00%  
Deferred Tax Assets, Valuation Allowance 0 0
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares) 852,250 864,500
Property Plant And Equipment And Leasehold Improvements [Member]
   
Significant Accounting Policies (Details) [Line Items]    
Depreciation, Depletion and Amortization $ 45,240 $ 42,779
Marketing And Distribution Rights [Member]
   
Significant Accounting Policies (Details) [Line Items]    
Finite-Lived Intangible Asset, Useful Life 18 years  
Purchased Technology Use Rights and Licenses [Member]
   
Significant Accounting Policies (Details) [Line Items]    
Finite-Lived Intangible Asset, Useful Life 10 years  
Patents [Member]
   
Significant Accounting Policies (Details) [Line Items]    
Finite-Lived Intangible Asset, Useful Life 17 years  
Maximum [Member]
   
Significant Accounting Policies (Details) [Line Items]    
Property, Plant and Equipment, Useful Life 10 years  
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price (in Dollars per share) $ 0.43  
Minimum [Member]
   
Significant Accounting Policies (Details) [Line Items]    
Property, Plant and Equipment, Useful Life 5 years  
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price (in Dollars per share) $ 0.38