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FINANCIAL INSTRUMENTS - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Short-term investments: |  |
Short-term investments | $ 7,678 | $ 11,818
Total assets | 10,482 | 309,231
Time deposits |  |
Short-term investments: |  |
Short-term investments | 7,678 | 11,818
Quoted Market Prices in Active Markets for Identical Assets (Level 1) |  |
Short-term investments: |  |
Total assets | 2,216 | 260,582
Quoted Market Prices in Active Markets for Identical Assets (Level 1) | Time deposits |  |
Short-term investments: |  |
Short-term investments | 0 | 0
Significant Other Observable Inputs (Level 2) |  |
Short-term investments: |  |
Total assets | 8,266 | 48,649
Significant Other Observable Inputs (Level 2) | Time deposits |  |
Short-term investments: |  |
Short-term investments | 7,678 | 11,818
Money market funds |  |
Cash equivalents: |  |
Cash equivalents | 2,216 | 260,582
Money market funds | Quoted Market Prices in Active Markets for Identical Assets (Level 1) |  |
Cash equivalents: |  |
Cash equivalents | 2,216 | 260,582
Money market funds | Significant Other Observable Inputs (Level 2) |  |
Cash equivalents: |  |
Cash equivalents | 0 | 0
Time deposits |  |
Cash equivalents: |  |
Cash equivalents | 588 | 36,831
Time deposits | Quoted Market Prices in Active Markets for Identical Assets (Level 1) |  |
Cash equivalents: |  |
Cash equivalents | 0 | 0
Time deposits | Significant Other Observable Inputs (Level 2) |  |
Cash equivalents: |  |
Cash equivalents | $ 588 | $ 36,831

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