MARKETABLE SECURITIES - Marketable Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Interest receivable	$ 2,500	$ 2,300
Amortized Cost	243,595	247,384
Gross Unrealized Gains	322	967
Gross Unrealized Losses	(754)	(711)
Estimated Fair Market Value	243,163	247,640
Investments due in 3 months or less:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	18,891	10,688
Gross Unrealized Gains	2	0
Gross Unrealized Losses	(63)	(42)
Estimated Fair Market Value	18,830	10,646
Investments due in 4-12 months:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	34,732	49,398
Gross Unrealized Gains	6	15
Gross Unrealized Losses	(206)	(347)
Estimated Fair Market Value	34,532	49,066
Investments due in 12 months or greater:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	189,972	187,298
Gross Unrealized Gains	314	952
Gross Unrealized Losses	(485)	(322)
Estimated Fair Market Value	189,801	187,928
Commercial paper | Investments due in 4-12 months:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	728	718
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Market Value	728	718
Corporate securities | Investments due in 3 months or less:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	18,891	10,688
Gross Unrealized Gains	2	0
Gross Unrealized Losses	(63)	(42)
Estimated Fair Market Value	18,830	10,646
Corporate securities | Investments due in 4-12 months:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	34,004	48,680
Gross Unrealized Gains	6	15
Gross Unrealized Losses	(206)	(347)
Estimated Fair Market Value	33,804	48,348
Corporate securities | Investments due in 12 months or greater:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	189,972	187,298
Gross Unrealized Gains	314	952
Gross Unrealized Losses	(485)	(322)
Estimated Fair Market Value	$ 189,801	$ 187,928