Summary of significant accounting policies - Research and development incentives and receivable (Details) - USD ($) $ in Millions |
1 Months Ended | 12 Months Ended | |||||
|---|---|---|---|---|---|---|---|
Apr. 01, 2024 |
Apr. 01, 2023 |
Mar. 31, 2023 |
Feb. 29, 2024 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Research and development incentives and receivable | |||||||
| Reduction of research and development | $ 43.1 | $ 23.5 | $ 19.3 | ||||
| Certain research and development expenditures incurred prior to April 1, 2023 | |||||||
| Research and development incentives and receivable | |||||||
| Percentage of surrenderable losses | 33.35% | ||||||
| Certain research and development expenditures incurred thereafter April 1, 2023 | |||||||
| Research and development incentives and receivable | |||||||
| Percentage of surrenderable losses | 18.60% | 26.97% | |||||
| Certain research and development expenditures incurred April 1, 2024 and thereafter | |||||||
| Research and development incentives and receivable | |||||||
| Percentage of surrenderable losses | 40.00% | ||||||
| Percentage of total expenditure | 30.00% | ||||||