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Note 18 – Derivatives (Tables) | 12 Months Ended
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Apr. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
[custom:ScheduleOfAssumptionsUsed2TableTextBlock] |
|  |  | April 30, 2022 |  |  |  | April 30, 2021 |
Risk-free interest rate |  |  | 0.52 – 2.87% |  |  |  | 0.08 – 0.61% |
Expected dividend yield |  |  | — |  |  |  | — |
Expected term (in years) |  |  | 3.42 – 4.50 |  |  |  | 1.54 – 5.00 |
Expected volatility |  |  | 211.02 – 292.28% |  |  |  | 86.74 – 110.56% |
Schedule of Derivative Liabilities at Fair Value [Table Text Block] |
|  | 2022 |  | 2021
Balance, beginning of period |  | $ | 2,812,767 |  |  | $ | — |
Additions |  |  | — |  |  |  | 5,710,288 |
Eliminated upon conversion of notes/exercise of warrants |  |  | (163,141 | ) |  |  | (5,390,415 | )
Changes in fair value |  |  | (1,042,129 | ) |  |  | 2,492,894 |
Balance, end of period |  | $ | 1,607,497 |  |  | $ | 2,812,767 |

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