Related party transactions - Summarizes the Company's related party transactions (Details) - USD ($) |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
May 31, 2026 |
May 31, 2025 |
May 31, 2026 |
May 31, 2025 |
|
| Related party transactions | ||||
| Office salaries and benefits | $ 2,340,352 | $ 512,525 | $ 7,471,800 | $ 1,538,915 |
| MAC Engineering, SASU | ||||
| Related party transactions | ||||
| Research and Development | 997,479 | |||
| Roger Moore | ||||
| Related party transactions | ||||
| Interest expense | 74,913 | 224,161 | ||
| California Electric Boat Company | ||||
| Related party transactions | ||||
| Rental expense | $ 52,979 | $ 48,942 | 156,604 | $ 146,827 |
| Marine Ventures LLC | ||||
| Related party transactions | ||||
| Rental expense | 143,720 | |||
| Management fees | $ 159,269 | |||