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FAIR VALUE MEASUREMENTS - RECURRING BASIS (Details) - Recurring basis - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Fair Value on a Recurring Basis |  |
Total | $ 367,694 | $ 156,036
Money market funds |  |
Fair Value on a Recurring Basis |  |
Total | 12,813 | 39,864
Certificate of deposit |  |
Fair Value on a Recurring Basis |  |
Total | 272 | 271
U.S. Treasury securities |  |
Fair Value on a Recurring Basis |  |
Total | 26,446 | 12,921
Municipal securities |  |
Fair Value on a Recurring Basis |  |
Total |  | 2,976
Government-sponsored enterprise securities |  |
Fair Value on a Recurring Basis |  |
Total | 104,852 | 9,846
Commercial paper |  |
Fair Value on a Recurring Basis |  |
Total | 153,274 | 64,199
Corporate notes |  |
Fair Value on a Recurring Basis |  |
Total | 70,037 | 25,959
Level 1 |  |
Fair Value on a Recurring Basis |  |
Total | 13,085 | 40,135
Level 1 | Money market funds |  |
Fair Value on a Recurring Basis |  |
Total | 12,813 | 39,864
Level 1 | Certificate of deposit |  |
Fair Value on a Recurring Basis |  |
Total | 272 | 271
Level 2 |  |
Fair Value on a Recurring Basis |  |
Total | 354,609 | 115,901
Level 2 | U.S. Treasury securities |  |
Fair Value on a Recurring Basis |  |
Total | 26,446 | 12,921
Level 2 | Municipal securities |  |
Fair Value on a Recurring Basis |  |
Total |  | 2,976
Level 2 | Government-sponsored enterprise securities |  |
Fair Value on a Recurring Basis |  |
Total | 104,852 | 9,846
Level 2 | Commercial paper |  |
Fair Value on a Recurring Basis |  |
Total | 153,274 | 64,199
Level 2 | Corporate notes |  |
Fair Value on a Recurring Basis |  |
Total | $ 70,037 | $ 25,959

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