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Subsequent Events	3 Months Ended
	Aug. 31, 2018
Subsequent Events [Abstract]
Subsequent Events [Text Block]	Note 7:  Subsequent Events      In September 2018, the Company granted 139,000 options to purchase common stock to various employees at the exercise price of $3.62 per share under the 2017 Stock Option and Restricted Stock Option plan. The shares are exercisable one quarter one year from date of grant and one quarter per year thereafter and expire five years from date of grant.      Subsequent to August 31, 2018, the Company sold 52,936 shares of its common stock under its At Market Issuance Sales Agreement and S-3 Registration Statement for total net proceeds of approximately $180,000.      Subsequent to August 31, 2018, 27,000 options to purchase shares of the Company’s common stock were exercised at prices ranging from $0.71 to $1.04. Gross proceeds to the Company were $20,500.

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- Definition

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

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