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