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Note 17 – Share Based Awards (Tables) | 3 Months Ended
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Jul. 31, 2022
Share-Based Payment Arrangement [Abstract] |
[custom:ScheduleOfAssumptionsUsed1TableTextBlock] |
|  |  | 2022 |  |  |  | 2021 |
Exercise Price |  |  | — |  |  |  | $ 2.41 – 2.60 |
Stock price on date of grant |  |  | — |  |  |  | 2.41 – 2.60 |
Risk-free interest rate |  |  | — |  |  |  | 0.47 – 1.57% |
Dividend yield |  |  | — |  |  |  | — |
Expected term (years) |  |  | — |  |  |  | 3.75 – 10.00 |
Volatility |  |  | — |  |  |  | 210.68 – 214.17% |
Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block] |
Options |  | Shares |  | Weighted-Average Exercise Price |  | Weighted-Average Remaining Contractual Term |  | Aggregate Intrinsic Value
Outstanding as of April 30, 2021 |  |  | 2,197,475 |  |  | $ | 1.79 |  |  |  | 8.68 |  |  |  | 4,943,870 |
Granted |  |  | 1,681,000 |  |  |  | 2.58 |  |  |  |  |  |  |  |  |
Exercised |  |  | (150,000 | ) |  |  | 2.49 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (34,333 | ) |  |  | 2.11 |  |  |  |  |  |  |  |  |
Outstanding as of April 30, 2022 |  |  | 3,694,142 |  |  |  | 2.17 |  |  |  | 8.56 |  |  |  | 1,407,545 |
Granted |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |
Exercised |  |  | — |  |  |  |  |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (60,000 | ) |  |  | 2.55 |  |  |  |  |  |  |  |  |
Outstanding as of July 31, 2022 |  |  | 3,634,142 |  |  |  | 2.16 |  |  |  | 8.31 |  |  |  | 1,608,791 |
Exercisable as of July 31, 2022 |  |  | 2,312,975 |  |  | $ | 1.89 |  |  |  | 7.68 |  |  | $ | 1,334,291 |
Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] |
Restricted Stock |  | Shares |  | Weighted Average Grant-Date Fair Value Per Share
Unvested and outstanding as of April 30, 2021 |  |  | 687,500 |  |  | $ | 2.69 |
Granted |  |  | 995,659 |  |  |  | 2.55 |
Vested |  |  | (599,484 | ) |  |  | 2.64 |
Forfeited |  |  | — |  |  |  | — |
Unvested and outstanding as of April 30, 2022 |  |  | 1,083,675 |  |  |  | 2.59 |
Granted |  |  | — |  |  |  | — |
Vested |  |  | (111,974 | ) |  |  | 2.57 |
Forfeited |  |  | — |  |  |  | — |
Unvested and outstanding as of July 31, 2022 |  |  | 971,701 |  |  | $ | 2.59 |
Schedule of Deferred Compensation Arrangement with Individual, Share-Based Payments [Table Text Block] |
|  | 2022 |  | 2021
General and administrative |  | $ | 345,168 |  |  | $ | 219,601 |
Research and development |  |  | 144,798 |  |  |  | 56,480 |
Operations |  |  | 158,431 |  |  |  | 63,261 |
Sales and marketing |  |  | 107,074 |  |  |  | 44,744 |
Total |  | $ | 755,471 |  |  | $ | 384,086 |

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