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Note 7 – Intangible Assets (Tables) | 9 Months Ended
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Jan. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets and Goodwill [Table Text Block] |
|  | January 31, 2023 |  | April 30, 2022
|  | Gross Value |  | Accumulated Amortization |  | Net Value |  | Gross Value |  | Accumulated Amortization |  | Net Value
Proprietary technology |  | $ | 4,967,000 |  |  | $ | (631,997 | ) |  | $ | 4,335,003 |  |  | $ | 1,098,000 |  |  | $ | (219,267 | ) |  | $ | 878,733 |
Non-compete agreements |  |  | 81,000 |  |  |  | (49,916 | ) |  |  | 31,084 |  |  |  | 81,000 |  |  |  | (29,667 | ) |  |  | 51,333 |
Customer relationships |  |  | 39,000 |  |  |  | (16,713 | ) |  |  | 22,287 |  |  |  | 39,000 |  |  |  | (12,535 | ) |  |  | 26,465 |
Total finite-lived assets |  |  | 5,087,000 |  |  |  | (698,626 | ) |  |  | 4,388,374 |  |  |  | 1,218,000 |  |  |  | (261,469 | ) |  |  | 956,531 |
Brand name |  |  | 3,152,000 |  |  |  | — |  |  |  | 3,152,000 |  |  |  | 1,722,000 |  |  |  | — |  |  |  | 1,722,000 |
Trademark |  |  | 20,000 |  |  |  | — |  |  |  | 20,000 |  |  |  | 20,000 |  |  |  | — |  |  |  | 20,000 |
Total indefinite-lived assets |  |  | 3,172,000 |  |  |  | — |  |  |  | 3,172,000 |  |  |  | 1,742,000 |  |  |  | — |  |  |  | 1,742,000 |
Total intangible assets, net |  | $ | 8,259,000 |  |  | $ | (698,626 | ) |  | $ | 7,560,374 |  |  | $ | 2,960,000 |  |  | $ | (261,469 | ) |  | $ | 2,698,531 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
Fiscal Year Ended: |  |
| 2023 |  |  | $ | 217,371 |
| 2024 |  |  |  | 866,805 |
| 2025 |  |  |  | 842,471 |
| 2026 |  |  |  | 815,271 |
| 2027 |  |  |  | 786,679 |
| Thereafter |  |  |  | 859,777 |
| Total |  |  | $ | 4,388,374 |
Schedule of Goodwill [Table Text Block] |
| Date |  | Acquisition |  | Goodwill
| January 2020 |  |  | Rotor Riot |  | $ | 1,849,073 |
| November 2020 |  |  | Fat Shark |  |  | 6,168,260 |
| Balance at April 30, 2021 |  |  |  |  |  | 8,017,333 |
| May 2021 |  |  | Skypersonic |  |  | 2,826,918 |
| August 2021 |  |  | Teal Drones |  |  | 8,995,499 |
| Balance at April 30, 2022 and January 31, 2023 |  |  |  |  | $ | 19,839,750 |

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