Nature of the business and basis of presentation - Liquidity (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2026 |
Jun. 30, 2026 |
Mar. 31, 2026 |
Sep. 30, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
Dec. 31, 2025 |
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| Nature of the business and basis of presentation | |||||||||
| Cash and cash equivalents | $ 469,928 | $ 648,325 | $ 469,928 | $ 648,325 | $ 628,110 | ||||
| Net loss | 10,478 | $ 50,333 | $ 60,825 | $ 59,100 | $ 78,952 | $ 60,754 | 121,636 | $ 198,806 | |
| Accumulated deficit | $ 1,021,387 | $ 1,021,387 | $ 899,751 | ||||||
| X | ||||||||||
- Definition Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Amount of accumulated undistributed earnings (deficit). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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