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Antidilutive securities excluded from computation of diluted net loss per share (Details) - shares | 3 Months Ended
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Jul. 31, 2024 | Jul. 31, 2023
Accounting Policies [Abstract] |  |
Series B Preferred Stock, as converted | 3,896 | 3,896
Stock options | 7,319,988 | 6,884,017
Warrants | 1,821,291 | 1,539,999
Restricted stock | 2,202,599 | 842,701
Total | 11,347,774 | 9,270,613

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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