Fair value measurement and hierarchy (Details) - Volatility |
May 31, 2025 |
Nov. 30, 2024 |
Dec. 13, 2023 |
|---|---|---|---|
| Series A Convertible Preferred Shares | |||
| Fair value measurement and hierarchy | |||
| Percentage of fair value of derivative liability on volatility rate | 85.00% | 70.00% | |
| Series B Convertible Preferred Shares | |||
| Fair value measurement and hierarchy | |||
| Percentage of fair value of derivative liability on volatility rate | 90.00% | ||
| Derivatives | |||
| Fair value measurement and hierarchy | |||
| Percentage of fair value of derivative liability to determine remaining contractual life | 99.00% |