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Investments and fair value measurements - Schedule of Investments on Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Current assets:
Fair Value	$ 272,364	$ 305,564
Strategic investments	0	10,311
U.S. government securities
Current assets:
Marketable securities:	148,559	171,372
Money market funds
Current assets:
Fair Value	234,681	266,692
Level 1
Current assets:
Strategic investments	0	0
Non-current liabilities:
Cash settled stock appreciation rights	0	0
Level 1 | U.S. government securities
Current assets:
Marketable securities:	0	0
Level 1 | Money market funds
Current assets:
Fair Value	234,681	266,692
Level 2
Current assets:
Strategic investments	0	0
Non-current liabilities:
Cash settled stock appreciation rights	0	0
Level 2 | U.S. government securities
Current assets:
Marketable securities:	148,559	171,372
Level 2 | Money market funds
Current assets:
Fair Value	0	0
Level 3
Current assets:
Strategic investments	0	10,311
Non-current liabilities:
Cash settled stock appreciation rights	16	48
Level 3 | U.S. government securities
Current assets:
Marketable securities:	0	0
Level 3 | Money market funds
Current assets:
Fair Value	$ 0	$ 0

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