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Note 17 – Share Based Awards (Tables) | 6 Months Ended
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Oct. 31, 2024
Share-Based Payment Arrangement [Abstract] |
[custom:ScheduleOfAssumptionsUsed1TableTextBlock] |
|  |  | 2024 |  |  |  | 2023 |
Exercise Price |  | $ | 1.15 – 2.45 |  |  | $ | 0.95 – 1.12 |
Stock price on date of grant |  |  | 1.20 – 2.56 |  |  |  | 0.95 – 1.12 |
Risk-free interest rate |  |  | 3.54 – 4.44% |  |  |  | 3.47 – 4.34% |
Dividend yield |  |  | — |  |  |  | — |
Expected term (years) |  |  | 5.17 – 5.73 |  |  |  | 6.00 – 8.25 |
Volatility |  |  | 191.43 – 199.03% |  |  |  | 242.38 – 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 |  |  | 1,333,500 |  |  |  | 1.94 |  |  |  |  |  |  |  |  |
Exercised |  |  | (97,414 | ) |  |  | 1.60 |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (119,117 | ) |  |  | 1.47 |  |  |  |  |  |  |  |  |
Outstanding as of October 31, 2024 |  |  | 7,896,903 |  |  |  | 1.54 |  |  |  | 7.55 |  |  |  | 12,438,946 |
Exercisable as of October 31, 2024 |  |  | 4,557,077 |  |  | $ | 1.63 |  |  |  | 6.45 |  |  | $ | 6,959,111 |
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 |  |  | 2,497,599 |  |  |  | 1.10 |
Vested |  |  | (914,416 | ) |  |  | 1.18 |
Forfeited |  |  | — |  |  |  | — |
Unvested and outstanding as of October 31, 2024 |  |  | 1,758,313 |  |  | $ | 1.16 |
Schedule of Deferred Compensation Arrangement with Individual, Share-Based Payments [Table Text Block] |
|  | Three months ended October 31, |  | Six months ended October 31,
|  | 2024 |  | 2023 |  | 2024 |  | 2023
Research and development |  | $ | 80,093 |  |  | $ | 147,629 |  |  | $ | 174,515 |  |  | $ | 275,046 |
Sales and marketing |  |  | 130,264 |  |  |  | 208,903 |  |  |  | 246,807 |  |  |  | 374,212 |
General and administrative |  |  | 1,093,680 |  |  |  | 839,793 |  |  |  | 2,328,753 |  |  |  | 1,458,673 |
Total |  | $ | 1,304,037 |  |  | $ | 1,196,325 |  |  | $ | 2,750,075 |  |  | $ | 2,107,931 |

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