Share-based payments - Schedule of Fair Value of Restricted Stock Units (Details) - Restricted stock units |
9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
|
Dec. 01, 2025
shares
|
Jul. 01, 2024
shares
|
Sep. 30, 2026
shares
$ / shares
|
Dec. 31, 2025
shares
$ / shares
|
|
| Restricted stock units | ||||
| Beginning balance (in shares) | shares | 1,666,667 | 1,666,667 | ||
| Granted (in shares) | shares | 1,500,000 | 2,600,000 | 0 | 1,500,000 |
| Canceled (in shares) | shares | 1,500,000 | |||
| Ending balance (in shares) | shares | 1,666,667 | 750,999 | 1,666,667 | |
| Weighted Average Grant Date Fair Value ($) | ||||
| Beginning balance (in dollars per share) | $ / shares | $ 3.93 | $ 6.21 | ||
| Granted (in dollars per share) | $ / shares | 0 | 3.68 | ||
| Cancelled (in dollars per share) | $ / shares | 6.21 | |||
| Vested (in dollars per share) | $ / shares | 3.68 | |||
| Ending balance (in dollars per share) | $ / shares | $ 4.24 | $ 3.93 | ||
| Number of shares vested (in shares) | shares | 84,332 |