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Note 6 – Other Current Assets (Tables)
9 Months Ended
Jan. 31, 2024
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Schedule of Other Current Assets [Table Text Block]
   January 31, 2024  April 30, 2023
Prepaid expenses  $1,152,751   $752,564 
Prepaid inventory   970,542    359,500 
Grant receivable   675,000       
Accrued interest income         151,671 
Total  $2,798,293   $1,263,735