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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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