Quarterly report pursuant to Section 13 or 15(d)

Antidilutive securities excluded from computation of diluted net loss per share (Details)

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Antidilutive securities excluded from computation of diluted net loss per share (Details) - shares
3 Months Ended 12 Months Ended
Jul. 31, 2022
Apr. 30, 2022
Accounting Policies [Abstract]    
Series B Preferred Stock, as converted 822,230 822,230
Stock options 3,634,142 3,694,142
Warrants 1,539,999 1,539,999
Restricted stock 971,701 1,083,675
Total 6,968,072 7,140,046