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Note 19 – Derivatives (Tables)
 3 Months Ended
Jul. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
[custom:ScheduleOfAssumptionsUsed2TableTextBlock]
    July 31, 2023    April 30, 2023 
Risk-free interest rate    4.88%    2.83 – 4.51% 
Expected dividend yield   —      —   
Expected term (in years)    2.17 – 2.50    2.42 – 3.50 
Expected volatility    107.27 – 107.90%    138.49 – 235.23% 
Schedule of Derivative Liabilities at Fair Value [Table Text Block]
   July 31, 2023  April 30, 2023
Balance, beginning of period  $588,205   $1,607,497 
Additions   —      —   
Eliminated upon conversion of notes/exercise of warrants   —      —   
Changes in fair value   (26,520)   (1,019,292)
Balance, end of period  $561,685   $588,205