Significant Accounting Policies (Details) (USD $)	3 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	May 31, 2013
Significant Accounting Policies (Details) [Line Items]
Depreciation, Depletion and Amortization (in Dollars)	$ 42,779	$ 45,387
Amortization of Intangible Assets (in Dollars)	7,456	8,780
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)	20,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)	$ 0.83
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in Shares)	2,000
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 (in Dollars)	760
Equity Method Investment, Ownership Percentage	6.00%
Deferred Tax Assets, Valuation Allowance (in Dollars)	$ 0		$ 0
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares)	0	85,000
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
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