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Nature of the business and basis of presentation - Liquidity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Nature of the business and basis of presentation
Cash and cash equivalents	$ 879,520	$ 526,423	$ 339,154
Net loss	169,031	180,664	$ 112,717
Accumulated deficit	$ (680,791)	$ (511,760)

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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