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Note 6 – Other Current Assets (Tables)
 12 Months Ended
Apr. 30, 2024
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Schedule of Other Current Assets [Table Text Block]
   April 30, 2024  April 30, 2023
Contract asset  $1,477,859   $—   
Prepaid expenses   1,206,306    752,564 
Grant receivable   675,000    —   
Prepaid inventory   602,888    359,500 
Accrued interest income   —      151,671 
Total  $3,962,053   $1,263,735