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Note 15 – Share Based Awards (Tables) | 3 Months Ended
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Jul. 31, 2024
Share-Based Payment Arrangement [Abstract] |
[custom:ScheduleOfAssumptionsUsed1TableTextBlock] |
|  |  | 2024 |  |  |  | 2025 |
Exercise Price |  | $ | 1.15 – 1.29 |  |  | $ | 1.06 – 1.12 |
Stock price on date of grant |  |  | 1.20 – 1.38 |  |  |  | 1.06 – 1.12 |
Risk-free interest rate |  |  | 4.24 – 4.44% |  |  |  | 3.47 – 4.07% |
Dividend yield |  |  | — |  |  |  | — |
Expected term (years) |  |  | 5.24 – 5.85 |  |  |  | 6.00 – 6.25 |
Volatility |  |  | 191.28 – 199.48% |  |  |  | 257.25 – 260.22% |
Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block] |
|  | Shares |  | Weighted-Average Exercise Price |  | Weighted-Average Remaining Contractual Term |  | Aggregate Intrinsic Value
Outstanding as of April 30, 2023 |  |  | 4,784,809 |  |  | $ | 1.88 |  |  |  | 8.72 |  |  |  | 74,586 |
Granted |  |  | 2,903,542 |  |  |  | 1.02 |  |  |  |  |  |  |  |  |
Exercised |  |  | (3,000 | ) |  |  | 0.89 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (905,417 | ) |  |  | 2.27 |  |  |  |  |  |  |  |  |
Outstanding as of April 30, 2024 |  |  | 6,779,934 |  |  |  | 1.46 |  |  |  | 8.02 |  |  |  | 2,762,242 |
Granted |  |  | 627,500 |  |  |  | 1.15 |  |  |  |  |  |  |  |  |
Exercised |  |  | (4,000 | ) |  |  | 0.72 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (83,446 | ) |  |  | 1.55 |  |  |  |  |  |  |  |  |
Outstanding as of July 31, 2024 |  |  | 7,319,988 |  |  |  | 1.43 |  |  |  | 7.54 |  |  |  | 5,658,470 |
Exercisable as of July 31, 2024 |  |  | 4,444,723 |  |  | $ | 1.65 |  |  |  | 6.57 |  |  | $ | 3,014,807 |
Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] |
|  | Shares |  | Weighted Average Grant-Date Fair Value Per Share
Unvested and outstanding as of April 30, 2023 |  |  | 781,060 |  |  | $ | 2.44 |
Granted |  |  | 298,643 |  |  |  | 1.06 |
Vested |  |  | (485,024 | ) |  |  | 1.92 |
Forfeited |  |  | (419,549 | ) |  |  | 2.09 |
Unvested and outstanding as of April 30, 2024 |  |  | 175,130 |  |  |  | 2.09 |
Granted |  |  | 2,447,599 |  |  |  | 1.06 |
Vested |  |  | (420,130 | ) |  |  | 1.25 |
Forfeited |  |  | — |  |  |  | — |
Unvested and outstanding as of July 31, 2024 |  |  | 2,202,599 |  |  | $ | 1.11 |
Schedule of Deferred Compensation Arrangement with Individual, Share-Based Payments [Table Text Block] |
|  | 2024 |  | 2023
Research and development |  | $ | 94,422 |  |  | $ | 127,417 |
Sales and marketing |  |  | 116,543 |  |  |  | 165,309 |
General and administrative |  |  | 1,235,073 |  |  |  | 618,880 |
Total |  | $ | 1,446,038 |  |  | $ | 911,606 |

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