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Antidilutive securities excluded from computation of diluted net loss per share (Details) - shares | 9 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2023 | Apr. 30, 2022
Accounting Policies [Abstract] |  |
Series B Preferred Stock, as converted | 822,230 | 822,230
Stock options | 4,165,142 | 3,694,142
Warrants | 1,539,999 | 1,539,999
Restricted stock | 984,841 | 1,083,675
Total | 7,512,212 | 7,140,046

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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