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OTHER BALANCE SHEET DETAILS - Schedule of Other Accrued Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Balance Sheet Related Disclosures [Abstract] |  |
Accrued restructuring expenses | $ 11,733 | $ 0
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] | Total other accrued liabilities | Total other accrued liabilities
Operating lease liabilities – current | $ 4,589 | $ 4,122
Accrued research and development expenses | 3,763 | 7,115
Accrued professional fees | 1,505 | 1,704
Other | 1,964 | 3,066
Total other accrued liabilities | $ 23,554 | $ 16,007

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