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Note 5 – Other Current Assets (Tables)
6 Months Ended
Oct. 31, 2022
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Schedule of Other Current Assets [Table Text Block]
   October 31, 2022  April 30, 2022
Prepaid inventory  $3,705,853   $1,707,085 
Accrued interest income   312,931    385,730 
Prepaid expenses   434,655    262,069 
Total  $4,453,439   $2,354,884