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INVESTMENTS AND FAIR VALUE MEASUREMENTS - Investments (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 424,840 $ 197,022
Gross Unrealized Gains 124 6
Gross Unrealized Losses (514) (163)
Fair Value 424,450 196,865
Money market funds    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 137,903 42,199
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 0
Fair Value 137,903 42,199
U.S. treasury securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 85,578 22,215
Gross Unrealized Gains 123 0
Gross Unrealized Losses (96) (54)
Fair Value 85,605 22,161
U.S. corporate paper and bonds    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 199,350 128,005
Gross Unrealized Gains 1 6
Gross Unrealized Losses (385) (94)
Fair Value 198,966 127,917
International corporate bond holdings    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 2,009 4,603
Gross Unrealized Gains 0 0
Gross Unrealized Losses (33) (15)
Fair Value $ 1,976 $ 4,588