Summary of significant accounting policies - Liability for Sale of Future Royalties (Details) - USD ($) $ in Millions |
1 Months Ended | ||
|---|---|---|---|
Jul. 17, 2020 |
Jul. 31, 2020 |
Sep. 30, 2022 |
|
| Assigned royalty payments | |||
| Cash consideration received from Royalty Purchase Agreement | $ 650.0 | ||
| Assigned royalty payment, retained percentage | 57.067% | ||
| Remaining potential milestones that can be achieved | $ 250.0 | ||
| Royalty Purchase Agreement | Assigned Royalty Payments | |||
| Assigned royalty payments | |||
| Assigned royalty payment, percentage | 42.933% | ||
| Cash consideration received from Royalty Purchase Agreement | $ 650.0 | ||
| Royalty purchase agreement, termination period | 60 days | ||
| Royalty purchase agreement, payment maximum | $ 1,300.0 |