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Preferred Stock | 3 Months Ended
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Jul. 31, 2020
Equity [Abstract] |
Preferred Stock | (10) 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 July 31, 2020, no shares of preferred stock had been issued.

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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 + Details
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