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Note 2 – Summary of Significant Accounting Policies (Tables)
12 Months Ended
Apr. 30, 2022
Accounting Policies [Abstract]  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
   2022  2021
Series A Preferred Stock, as converted         1,321,996 
Series B Preferred Stock, as converted   822,230    1,640,563 
Stock Options   3,694,142    2,197,475 
Warrants   1,539,999    873,332 
Restricted stock   1,083,675    687,500 
Total   7,140,046    6,720,866