MARKETABLE SECURITIES - Marketable Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Interest receivable	$ 2,000	$ 1,200
Amortized Cost	265,514	253,764
Gross Unrealized Gains	45	71
Gross Unrealized Losses	(3,340)	(5,394)
Estimated Fair Market Value	262,219	248,441
Investments due in 3 months or less:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	50,417	21,803
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(281)	(135)
Estimated Fair Market Value	50,136	21,668
Investments due in 4-12 months:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	78,042	173,833
Gross Unrealized Gains	7	0
Gross Unrealized Losses	(1,383)	(4,019)
Estimated Fair Market Value	76,666	169,814
Investments due in 12 months or greater:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	137,055	58,128
Gross Unrealized Gains	38	71
Gross Unrealized Losses	(1,676)	(1,240)
Estimated Fair Market Value	135,417	56,959
Corporate securities | Investments due in 3 months or less:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	50,417	21,803
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(281)	(135)
Estimated Fair Market Value	50,136	21,668
Corporate securities | Investments due in 4-12 months:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	78,042	173,833
Gross Unrealized Gains	7	0
Gross Unrealized Losses	(1,383)	(4,019)
Estimated Fair Market Value	76,666	169,814
Corporate securities | Investments due in 12 months or greater:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	137,055	58,128
Gross Unrealized Gains	38	71
Gross Unrealized Losses	(1,676)	(1,240)
Estimated Fair Market Value	$ 135,417	$ 56,959