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CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($)	May 31, 2019	May 31, 2018
Allowance for doubtful accounts (in Dollars)	$ 73,110	$ 57,695
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	9,677,188	8,888,011
Common stock, shares outstanding	9,677,188	8,888,011

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Amount of allowance for credit loss on accounts receivable, classified as current.

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Face amount or stated value per share of common stock.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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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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