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Preferred Stock	9 Months Ended
	Jan. 31, 2021
Equity [Abstract]
Preferred Stock	(11) Preferred Stock The Company has authorized 5,000,000 shares of undesignated preferred stock with a par value of $0.001 per share. As of January 31, 2021, no shares of preferred stock had been issued.

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No definition available.

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- Definition

The entire disclosure for terms, amounts, nature of changes, rights and privileges, dividends, and other matters related to preferred stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-URI http://asc.fasb.org/topic&trid=2208762

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