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Deerfield warrants - Narrative (Details) - Deerfield Warrants - USD ($) |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Aug. 15, 2022 | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Class of Warrant or Right [Line Items] |  |  |  |  |  |
Debt conversion, warrants issued (in shares) | 4,412,840 |  |  |  |  |
Deerfield warrant obligation, change in fair value income |  | $ 0 | $ (1,130,000) | $ 0 | $ 292,000 |
Deerfield obligation, fair value |  |  |  |  |  | $ 0
Warrants, Tranche One |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |
Debt conversion, warrants issued (in shares) | 2,631,578 |  |  |  |  |
Warrant exercise price (in dollars per share) | $ 24.70 |  |  |  |  |
Warrants, Tranche Two |  |  |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |  |  |
Debt conversion, warrants issued (in shares) | 1,781,262 |  |  |  |  |
Warrant exercise price (in dollars per share) | $ 28.07 |  |  |  |  |

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- Definition The number of warrants issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-3 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482913/230-10-50-5 + Details
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