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Note 18 – Derivatives (Tables)
 3 Months Ended
Jul. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
[custom:ScheduleOfAssumptionsUsed2TableTextBlock]
    July 31, 2022    April 30, 2022 
Risk-free interest rate    2.83%    0.52 – 2.87% 
Expected dividend yield   —      —   
Expected term (in years)    3.17 – 3.50    3.42 – 4.50 
Expected volatility    225.77 – 235.23%    211.02 – 292.28% 
Schedule of Derivative Liabilities at Fair Value [Table Text Block]
   July 31, 2022  April 30, 2022
Balance, beginning of period  $1,607,497   $2,812,767 
Additions   —      —   
Eliminated upon conversion of notes/exercise of warrants   —      (163,141)
Changes in fair value   92,922    (1,042,129)
Balance, end of period  $1,700,419   $1,607,497 

 

Changes in fair value primarily relate to changes in the Company’s stock price during the period with increases in the stock price increasing the liability and decreases in the stock price reducing the liability.