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Note 2 – Summary of Significant Accounting Policies (Tables)
9 Months Ended
Jan. 31, 2024
Accounting Policies [Abstract]  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
   January 31, 2024  April 30, 2023
Series B Preferred Stock, as converted   3,896    822,230 
Stock options   6,679,100    4,784,809 
Warrants   1,539,999    1,539,999 
Restricted stock   653,386    781,060 
Total   8,876,381    7,928,098