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Note 18 – Derivatives (Tables) | 6 Months Ended
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Oct. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
[custom:ScheduleOfAssumptionsUsed2TableTextBlock] |
|  |  | October 31, 2022 |  |  |  | April 30, 2022 |
Risk-free interest rate |  |  | 2.83 – 4.51% |  |  |  | 0.52 – 2.87% |
Expected dividend yield |  |  | — |  |  |  | — |
Expected term (in years) |  |  | 2.92 – 3.50 |  |  |  | 3.42 – 4.50 |
Expected volatility |  |  | 190.09 – 235.23% |  |  |  | 211.02 – 292.28% |
Schedule of Derivative Liabilities at Fair Value [Table Text Block] |
|  | October 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 |  |  | (593,822 | ) |  |  | (1,042,129 | )
Balance, end of period |  | $ | 1,013,675 |  |  | $ | 1,607,497 |

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