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Note 8 – Property and Equipment (Tables)
3 Months Ended
Jul. 31, 2022
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment [Table Text Block]
   July 31, 2022  April 30, 2022
Equipment and related  $630,448   $509,376 
Leasehold improvements   567,404    149,330 
Furniture and fixtures   54,254    42,746 
Accumulated depreciation   (223,746)   (189,762)
Net carrying value  $1,028,360   $511,690