Cash equivalents and available-for-sale marketable securities - Cash equivalents and marketable securities (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2025 USD ($) item	Dec. 31, 2024 USD ($) item
Amortized Cost
Cash and cash equivalents	$ 74,755	$ 71,367
Total money market funds and marketable securities	$ 289,166	$ 320,958
Number of marketable securities | item	70	97
Debt securities, unrealized loss position	$ 128,300	$ 156,300
Unrealized Gains and Losses
Marketable securities, unrealized gains	105	64
Total money market funds and marketable securities - Unrealized Losses, Less than 12 months	(112)	(108)
Unrealized Losses, Greater than 12 months - Marketable securities	(65)	(235)
Fair Value
Total money market funds and marketable securities	$ 289,094	$ 320,679
Maximum
Amortized Cost
Debt securities, contractual maturity period	2 years	2 years
Money market funds
Amortized Cost
Cash and cash equivalents	$ 68,731	$ 59,658
Unrealized Gains and Losses
Unrealized Losses, Less than 12 Months - Money market funds included in cash and cash equivalents	(4)
Fair Value
Cash and cash equivalents, fair value	68,727	59,658
U.S. Treasury notes
Amortized Cost
Marketable securities, Amortized cost	130,594	125,996
Unrealized Gains and Losses
Marketable securities, unrealized gains	96	32
Unrealized Losses, Less than 12 months - Marketable securities	(55)	(45)
Unrealized Losses, Greater than 12 months - Marketable securities	(57)	(200)
Fair Value
Marketable securities, fair value	130,578	125,783
U.S. Government agency securities
Amortized Cost
Marketable securities, Amortized cost	16,412	27,552
Unrealized Gains and Losses
Marketable securities, unrealized gains	1	6
Unrealized Losses, Less than 12 months - Marketable securities	(3)	(5)
Unrealized Losses, Greater than 12 months - Marketable securities	(6)	(35)
Fair Value
Marketable securities, fair value	16,404	27,518
Certificates of deposit
Amortized Cost
Marketable securities, Amortized cost	3,320	4,280
Unrealized Gains and Losses
Marketable securities, unrealized gains		6
Fair Value
Marketable securities, fair value	3,320	4,286
Corporate bonds
Amortized Cost
Marketable securities, Amortized cost	61,438	95,016
Unrealized Gains and Losses
Marketable securities, unrealized gains	8	18
Unrealized Losses, Less than 12 months - Marketable securities	(50)	(58)
Unrealized Losses, Greater than 12 months - Marketable securities	(2)
Fair Value
Marketable securities, fair value	61,394	94,976
Commercial paper
Amortized Cost
Marketable securities, Amortized cost	8,671	8,456
Unrealized Gains and Losses
Marketable securities, unrealized gains		2
Fair Value
Marketable securities, fair value	$ 8,671	$ 8,458