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Note 5 – Other Current Assets (Tables)
9 Months Ended
Jan. 31, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Schedule of Other Current Assets [Table Text Block]
   January 31, 2023  April 30, 2022
Prepaid inventory  $3,308,315   $1,707,085 
Accrued interest income   233,471    385,730 
Prepaid expenses   1,004,767    262,069 
Total  $4,546,553   $2,354,884