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Note 5 – Inventories (Tables)
12 Months Ended
Apr. 30, 2024
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
   April 30, 2024  April 30, 2023
Raw materials  $5,750,324   $8,132,196 
Work-in-process   1,289,997    509,381 
Finished goods   966,916    278,996 
Total  $8,007,237   $8,920,573