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Investments and fair value measurements - Summary of the Changes in the Fair Value of Level 3 Financial Instruments (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Strategic Investments |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning balance | $ 10,311 | $ 12,104 | $ 10,311 | $ 12,104
Vesting and remeasurement of SARs | 0 | 0 | 0 | 0
Exercises of SARs |  | 0 | 0 | 0
Unrealized loss on strategic investments | (10,311) | (1,793) | (10,311) | (1,793)
Ending balance | 0 | 10,311 | 0 | 10,311
Stock Appreciation Rights (SARs) |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning balance | 22 | 264 | 48 | 462
Vesting and remeasurement of SARs | (6) | 19 | (25) | (179)
Exercises of SARs |  | (253) | (7) | (253)
Unrealized loss on strategic investments | 0 | 0 | 0 | 0
Ending balance | $ 16 | $ 30 | $ 16 | $ 30

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- Definition Fair Value, Measurement With Unobservable Inputs Reconciliation, Recurring Basis, Liability, Vesting And Remeasurement Of Share Based Award + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 101 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-101 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-3 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 102 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-102 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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