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Non-operating income - Narrative (Details) - USD ($) $ in Millions | Aug. 15, 2022 | Sep. 30, 2022 | May 19, 2020 | Apr. 24, 2020
--- | --- | --- | --- | ---
Warrants, Tranche One |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Convertible Notes, Shares Converted | 4,412,840 |  |  |
Facility Agreement With Deerfield Partners, L.P., Tranche One |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings |  |  | $ 65.0 | $ 65.0
Facility Agreement With Deerfield Partners, L.P., Tranche Two |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings |  |  |  | 50.0
Borrowings, maximum borrowing capacity |  |  |  | 50.0
Facility Agreement with Deerfield Partners, L.P. |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Borrowings |  | $ 120.0 |  |
Borrowings, maximum borrowing capacity |  |  |  | $ 115.0

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