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Note 5 – Other Current Assets (Tables)
 12 Months Ended
Apr. 30, 2022
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Schedule of Other Current Assets [Table Text Block]
   2022  2021
Prepaid inventory  $1,707,085   $478,939 
Accrued interest income   385,730    —   
Prepaid expenses   262,069    115,587 
Security deposits   —      9,372 
Due from related party   —      75,000 
Total  $2,354,884   $678,898