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Note 19 – Share Based Awards (Tables) | 12 Months Ended
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Apr. 30, 2024
Share-Based Payment Arrangement [Abstract] |
[custom:ScheduleOfAssumptionsUsed1TableTextBlock] |
|  |  | 2024 |  |  |  | 2025 |
Exercise Price |  | $ | 0.72 – 1.12 |  |  | $ | 0.89 – 2.38 |
Stock price on date of grant |  |  | 0.70 – 1.12 |  |  |  | 0.89 – 2.38 |
Risk-free interest rate |  |  | 3.46 – 4.41% |  |  |  | 3.34 – 4.18% |
Dividend yield |  |  | — |  |  |  | — |
Expected term (years) |  |  | 5.28 – 8.25 |  |  |  | 6.25 – 8.25 |
Volatility |  |  | 206.99 – 262.07% |  |  |  | 245.57 – 260.06% |
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, 2022 |  |  | 3,694,142 |  |  | $ | 2.17 |  |  |  | 8.56 |  |  |  | 1,407,545 |
Granted |  |  | 1,503,500 |  |  |  | 1.40 |  |  |  |  |  |  |  |  |
Exercised |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Forfeited or expired |  |  | (412,833 | ) |  |  | 2.67 |  |  |  |  |  |  |  |  |
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 |
Exercisable as of April 30, 2024 |  |  | 3,578,756 |  |  | $ | 1.78 |  |  |  | 6.77 |  |  | $ | 1,246,497 |
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, 2022 |  |  | 1,083,675 |  |  | $ | 2.59 |
Granted |  |  | 780,884 |  |  |  | 2.14 |
Vested |  |  | (1,062,372 | ) |  |  | 2.42 |
Forfeited |  |  | (21,127 | ) |  |  | 2.13 |
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 |
Schedule of Deferred Compensation Arrangement with Individual, Share-Based Payments [Table Text Block] |
|  | 2024 |  | 2023
Research and development |  | $ | 395,105 |  |  | $ | 692,947 |
Sales and marketing |  |  | 562,110 |  |  |  | 566,153 |
General and administrative |  |  | 2,652,052 |  |  |  | 2,397,624 |
Total |  | $ | 3,609,267 |  |  | $ | 3,656,724 |
Stock compensation expense pertaining to options totaled $2,619,501 and $1,617,982 for the year ended April 30, 2024 and 2023, respectively. Stock compensation expense pertaining to restricted stock totaled $989,766 and $2,038,742 for the year ended April 30, 2024 and 2023, respectively.

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- Definition Tabular disclosure of an equity-based arrangement (such as stock or unit options and stock or unit awards) with an individual employee, which is generally an employment contract between the entity and a selected officer or key employee containing a promise by the employer to pay certain equity-based awards at future dates, sometimes including a period after retirement, upon compliance with stipulated requirements. This type of arrangement is distinguished from broader based employee benefit plans as it is usually tailored to the employee. Disclosure also typically includes the amount of related compensation expense recognized during the reporting period, the number of shares or units issued during the period under such arrangements, and the carrying amount as of the balance sheet date of the related liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 710 -SubTopic 10 -Name Accounting Standards Codification -Section 30 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483043/710-10-30-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482943/710-10-55-8 + Details
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