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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Assets:    
Total $ 290,693 $ 213,961
Quoted Market Prices for Identical Assets in Active Markets (Level 1)    
Assets:    
Total 215,891 189,000
Significant Other Observable Inputs (Level 2)    
Assets:    
Total 74,802 24,961
Significant Unobservable Inputs (Level 3)    
Assets:    
Total 0 0
Money market funds    
Assets:    
Cash equivalents 215,891 189,000
Money market funds | Quoted Market Prices for Identical Assets in Active Markets (Level 1)    
Assets:    
Cash equivalents 215,891 189,000
Money market funds | Significant Other Observable Inputs (Level 2)    
Assets:    
Cash equivalents 0 0
Money market funds | Significant Unobservable Inputs (Level 3)    
Assets:    
Cash equivalents 0 0
Treasury discount notes    
Assets:    
Cash equivalents 74,802 24,961
Treasury discount notes | Quoted Market Prices for Identical Assets in Active Markets (Level 1)    
Assets:    
Cash equivalents 0 0
Treasury discount notes | Significant Other Observable Inputs (Level 2)    
Assets:    
Cash equivalents 74,802 24,961
Treasury discount notes | Significant Unobservable Inputs (Level 3)    
Assets:    
Cash equivalents $ 0 $ 0