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Significant Accounting Policies (Detail) (USD $)	3 Months Ended		6 Months Ended
	Nov. 30, 2012	Nov. 30, 2011	Nov. 30, 2012	Nov. 30, 2011
Depreciation, Depletion and Amortization (in Dollars)	$ 65,435	$ 43,622	$ 93,263	$ 71,195
Amortization (in Dollars)	$ 8,779	$ 8,363	$ 17,559	$ 15,476
Cost Method Investments, Percentage Of Investees	6.00%		6.00%
Effective Income Tax Rate, Continuing Operations			38.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	6.00%		6.00%
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in Shares)	510,250		621,250
Minimum [Member]
Property, Plant and Equipment, Useful Life			5 years
Maximum [Member]
Property, Plant and Equipment, Useful Life			10 years
Accounts Receivable [Member]
Concentration Risk, Percentage			62.90%
Net Sales [Member]
Concentration Risk, Percentage	54.30%		53.50%
Marketing and Distribution Rights
Finite-Lived Intangible Asset, Useful Life			18 years
Purchased Technology Use Rights and Licenses
Finite-Lived Intangible Asset, Useful Life			10 years
Patents [Member]
Finite-Lived Intangible Asset, Useful Life			17 years

X

- Definition

Percentage of investee to which the cost method investment is applied.

+ References

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- Definition

The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 07-4

-Paragraph 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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