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FAIR VALUE MEASUREMENTS - Financial Assets and Liabilities Measured on a Recurring Basis (Details) - Recurring - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Assets: |  |
Assets, fair value | $ 182,842 | $ 181,470
Liabilities: |  |
Liabilities, fair value |  | 675
Derivative liabilities for exit fee |  |
Liabilities: |  |
Liabilities, fair value |  | 675
Level 1 |  |
Assets: |  |
Assets, fair value | 39,869 | 18,641
Liabilities: |  |
Liabilities, fair value |  | 0
Level 1 | Derivative liabilities for exit fee |  |
Liabilities: |  |
Liabilities, fair value |  | 0
Level 2 |  |
Assets: |  |
Assets, fair value | 142,973 | 162,829
Liabilities: |  |
Liabilities, fair value |  | 0
Level 2 | Derivative liabilities for exit fee |  |
Liabilities: |  |
Liabilities, fair value |  | 0
Level 3 |  |
Assets: |  |
Assets, fair value | 0 | 0
Liabilities: |  |
Liabilities, fair value |  | 675
Level 3 | Derivative liabilities for exit fee |  |
Liabilities: |  |
Liabilities, fair value |  | 675
Money market funds |  |
Assets: |  |
Assets, fair value | 39,869 | 18,641
Money market funds | Level 1 |  |
Assets: |  |
Assets, fair value | 39,869 | 18,641
Money market funds | Level 2 |  |
Assets: |  |
Assets, fair value | 0 | 0
Money market funds | Level 3 |  |
Assets: |  |
Assets, fair value | 0 | 0
U.S. government-sponsored agency bonds |  |
Assets: |  |
Assets, fair value | 53,098 | 102,093
U.S. government-sponsored agency bonds | Level 1 |  |
Assets: |  |
Assets, fair value | 0 | 0
U.S. government-sponsored agency bonds | Level 2 |  |
Assets: |  |
Assets, fair value | 53,098 | 102,093
U.S. government-sponsored agency bonds | Level 3 |  |
Assets: |  |
Assets, fair value | 0 | 0
U.S. treasury securities |  |
Assets: |  |
Assets, fair value | 36,743 | 2,457
U.S. treasury securities | Level 1 |  |
Assets: |  |
Assets, fair value | 0 | 0
U.S. treasury securities | Level 2 |  |
Assets: |  |
Assets, fair value | 36,743 | 2,457
U.S. treasury securities | Level 3 |  |
Assets: |  |
Assets, fair value | 0 | 0
Commercial paper |  |
Assets: |  |
Assets, fair value | 30,792 | 49,654
Commercial paper | Level 1 |  |
Assets: |  |
Assets, fair value | 0 | 0
Commercial paper | Level 2 |  |
Assets: |  |
Assets, fair value | 30,792 | 49,654
Commercial paper | Level 3 |  |
Assets: |  |
Assets, fair value | 0 | 0
Corporate bonds |  |
Assets: |  |
Assets, fair value | 17,408 |
Corporate bonds | Level 1 |  |
Assets: |  |
Assets, fair value | 0 |
Corporate bonds | Level 2 |  |
Assets: |  |
Assets, fair value | 17,408 |
Corporate bonds | Level 3 |  |
Assets: |  |
Assets, fair value | 0 |
Asset-backed securities |  |
Assets: |  |
Assets, fair value | 2,978 | 8,625
Asset-backed securities | Level 1 |  |
Assets: |  |
Assets, fair value | 0 | 0
Asset-backed securities | Level 2 |  |
Assets: |  |
Assets, fair value | 2,978 | 8,625
Asset-backed securities | Level 3 |  |
Assets: |  |
Assets, fair value | 0 | $ 0
Yankee bonds |  |
Assets: |  |
Assets, fair value | 1,954 |
Yankee bonds | Level 1 |  |
Assets: |  |
Assets, fair value | 0 |
Yankee bonds | Level 2 |  |
Assets: |  |
Assets, fair value | 1,954 |
Yankee bonds | Level 3 |  |
Assets: |  |
Assets, fair value | $ 0 |

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