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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Cash and Cash Equivalents and Short-term Investments (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Fair value disclosure |  |
Cash and cash equivalents | $ 158,372 | $ 76,620
Short-term investments | 167,662 | 48,339
Concentrations of Credit Risk of Financial Instruments |  |
Cash, cash equivalents and short-term investments not FDIC-insured | 99,400 | 42,600
Cash deposits |  |
Fair value disclosure |  |
Cash and cash equivalents | 137,355 | 72,790
Variable rate demand notes |  |
Fair value disclosure |  |
Cash and cash equivalents | 9,285 | 230
Money market funds |  |
Fair value disclosure |  |
Cash and cash equivalents | 11,732 | 3,600
Certificates of deposit |  |
Fair value disclosure |  |
Short-term investments | 88,851 | $ 48,339
U.S. Treasury securities |  |
Fair value disclosure |  |
Short-term investments | $ 78,811 |

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