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CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($)	May 31, 2018	May 31, 2017
Allowance for doubtful accounts (in Dollars)	$ 57,695	$ 50,129
Preferred Stock, No Par Value (in Dollars per share)	$ 0	$ 0
Preferred Stock, shares authorized	5,000,000	5,000,000
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Common stock par value (in Dollars per share)	$ 0.08	$ 0.08
Common stock, shares authorized	25,000,000	25,000,000
Common stock, shares issued	8,888,011	8,511,173
Common stock, shares outstanding	8,888,011	8,511,173

X

- Definition

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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Face amount or stated value per share of common stock.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Face amount per share of no-par value preferred stock nonredeemable or redeemable solely at the option of the issuer.

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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