Investments and fair value measurements - Summary of Investments on Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Current assets:
Marketable securities:	$ 391,976	$ 354,436
Cash
Current assets:
Marketable securities:	52,200	42,300
Level 1
Current assets:
Total assets	178,045	146,580
Level 1 | U.S. government securities
Current assets:
Marketable securities:	0	0
Level 1 | Money market funds
Current assets:
Cash equivalents	172,448	136,771
Level 1 | Time deposits
Current assets:
Cash equivalents	5,597	9,809
Level 1 | U.S. government securities
Current assets:
Cash equivalents		0
Level 2
Current assets:
Total assets	161,718	165,530
Level 2 | U.S. government securities
Current assets:
Marketable securities:	161,718	163,844
Level 2 | Money market funds
Current assets:
Cash equivalents	0	0
Level 2 | Time deposits
Current assets:
Cash equivalents	0	0
Level 2 | U.S. government securities
Current assets:
Cash equivalents		1,686
Level 3
Current assets:
Total assets	0	0
Level 3 | U.S. government securities
Current assets:
Marketable securities:	0	0
Level 3 | Money market funds
Current assets:
Cash equivalents	0	0
Level 3 | Time deposits
Current assets:
Cash equivalents	$ 0	0
Level 3 | U.S. government securities
Current assets:
Cash equivalents		$ 0