Short-term and long-term marketable securities (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-Sale [Line Items]
Amortized cost	$ 792,667	$ 541,696
Gross unrealized gains	50	344
Gross unrealized losses	(311)	(75)
Fair value	792,406	541,965
Cash equivalents	254,434	206,879
Short-term marketable securities	449,839	315,803
Long-term marketable securities	88,133	19,283
Total	792,406	541,965
Money market funds
Debt Securities, Available-for-Sale [Line Items]
Amortized cost	244,283	206,879
Fair value	244,283	206,879
U.S. Treasury securities
Debt Securities, Available-for-Sale [Line Items]
Amortized cost	275,815	117,058
Gross unrealized gains	48	255
Gross unrealized losses	(125)	(6)
Fair value	275,738	117,307
Corporate debt securities
Debt Securities, Available-for-Sale [Line Items]
Amortized cost	68,674	15,773
Gross unrealized gains		1
Gross unrealized losses	(63)
Fair value	68,611	15,774
U.S. Government agency securities
Debt Securities, Available-for-Sale [Line Items]
Amortized cost	119,393	133,279
Gross unrealized gains	2	78
Gross unrealized losses	(57)	(60)
Fair value	119,338	133,297
Commercial paper
Debt Securities, Available-for-Sale [Line Items]
Amortized cost	84,502	68,707
Gross unrealized gains		10
Gross unrealized losses	(66)	(9)
Fair value	$ 84,436	$ 68,708