Subsequent Events	3 Months Ended
Jul. 31, 2019
Subsequent Events [Abstract]
Subsequent Events	Note 11. Subsequent Event Exercise of stock options On August 20, 2019, the Company issued a former director 17,382 shares of common stock upon a cashless exercise of stock options granted on November 20, 2015 and May 19, 2016.

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.

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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