MARKETABLE SECURITIES - Marketable Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Interest receivable	$ 1,700	$ 1,200
Amortized Cost	267,590	253,764
Gross Unrealized Gains	324	71
Gross Unrealized Losses	(3,475)	(5,394)
Estimated Fair Market Value	264,439	248,441
Investments due in 3 months or less:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	72,749	21,803
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(348)	(135)
Estimated Fair Market Value	72,401	21,668
Investments due in 4-12 months:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	111,179	173,833
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(2,375)	(4,019)
Estimated Fair Market Value	108,804	169,814
Investments due in 12 months or greater:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	83,662	58,128
Gross Unrealized Gains	324	71
Gross Unrealized Losses	(752)	(1,240)
Estimated Fair Market Value	83,234	56,959
Corporate securities | Investments due in 3 months or less:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	72,749	21,803
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(348)	(135)
Estimated Fair Market Value	72,401	21,668
Corporate securities | Investments due in 4-12 months:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	111,179	173,833
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(2,375)	(4,019)
Estimated Fair Market Value	108,804	169,814
Corporate securities | Investments due in 12 months or greater:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	83,662	58,128
Gross Unrealized Gains	324	71
Gross Unrealized Losses	(752)	(1,240)
Estimated Fair Market Value	$ 83,234	$ 56,959