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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Cash and Cash Equivalents and Short-term Investments (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Fair value disclosure |  |
Cash and cash equivalents | $ 215,590 | $ 262,226
Short-term investments | 44,865 | 67,842
Concentrations of Credit Risk of Financial Instruments |  |
Cash deposits and short-term investments which were not FDIC insured | 44,500 | 76,300
Cash deposits |  |
Fair value disclosure |  |
Cash and cash equivalents | 126,758 | 168,472
Money market funds |  |
Fair value disclosure |  |
Cash and cash equivalents | 88,832 | 93,754
Certificates of deposit |  |
Fair value disclosure |  |
Short-term investments | $ 44,865 | $ 67,842

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