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Note 5 – Other Current Assets (Tables)
 3 Months Ended
Jul. 31, 2024
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Schedule of Other Current Assets [Table Text Block]
   July 31, 2024  April 30, 2024
Prepaid expenses  $2,387,937   $1,206,306 
Prepaid inventory   204,742    602,888 
Contract asset   —      1,477,859 
Grant receivable   —      675,000 
Total  $2,592,679   $3,962,053