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Note 17 – Warrants (Tables)
3 Months Ended
Jul. 31, 2023
Note 17 Warrants  
[custom:ScheduleOfWarrantsIssuedAndFairValueTableTextBlock]
                
   Upon Issuance  Outstanding at July 31, 2023
Date of Transaction  Number of Warrants  Initial Fair Value  Number of Warrants  Fair Value
 October 2020     399,998   $267,999    266,666   $179,982 
 January 2021    675,000   $2,870,666    540,000   $381,703 
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
   

 

Number of Shares 

 

 

Weighted-average Exercise Price per Share

 

 Weighted-average Remaining Contractual Term

(in years) 

 

 

Aggregate Intrinsic Value 

  Balance as of April 30, 2022 1,539,999     3.38        3.89     $ 427,533  
  Granted                               
  Exercised                             
  Outstanding as of April 30, 2023 1,539,999     3.38       2.89     $     
  Granted                            
  Exercised                           
  Outstanding at July 31, 2023 1,539,999     3.38       2.63     $