Recurring Fair Value Measurement - Schedule of cash equivalents, marketable securities, and unrealized gains and losses (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2025	Dec. 31, 2024
Cash and Cash Equivalents [Line Items]
Cash equivalents, amortized cost	$ 35,622	$ 124,968
Marketable securities
Cash and Cash Equivalents [Line Items]
Debt securities, available-for-sale, amortized cost	417,573	406,667
Debt securities, available-for-sale, unrealized gain	10	98
Debt securities, available-for-sale, unrealized loss	(102)	(13)
Debt securities, available-for-sale, estimated fair value	417,481	406,752
Cash equivalents
Cash and Cash Equivalents [Line Items]
Cash equivalents, amortized cost	23,857	104,838
Cash equivalents, unrealized gains	0	0
Cash equivalents, unrealized losses	0	0
Cash and cash equivalents, fair value disclosure	23,857	104,838
Money market funds
Cash and Cash Equivalents [Line Items]
Cash equivalents, amortized cost	13,569	16,728
Cash equivalents, unrealized gains	0	0
Cash equivalents, unrealized losses	0	0
Cash and cash equivalents, fair value disclosure	13,569	16,728
U.S. government agency securities
Cash and Cash Equivalents [Line Items]
Cash equivalents, amortized cost	10,288	75,163
Cash equivalents, unrealized gains	0	0
Cash equivalents, unrealized losses	0	0
Cash and cash equivalents, fair value disclosure	10,288	75,163
Debt securities, available-for-sale, amortized cost	100,152	108,210
Debt securities, available-for-sale, unrealized gain	3	13
Debt securities, available-for-sale, unrealized loss	(19)	(11)
Debt securities, available-for-sale, estimated fair value	100,136	108,212
U.S. treasury securities
Cash and Cash Equivalents [Line Items]
Cash equivalents, amortized cost		12,947
Cash equivalents, unrealized gains		0
Cash equivalents, unrealized losses		0
Cash and cash equivalents, fair value disclosure		12,947
Debt securities, available-for-sale, amortized cost	317,421	298,457
Debt securities, available-for-sale, unrealized gain	7	85
Debt securities, available-for-sale, unrealized loss	(83)	(2)
Debt securities, available-for-sale, estimated fair value	$ 317,345	$ 298,540