MARKETABLE SECURITIES (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 253,764	$ 373,400
Gross Unrealized Gains	71	21
Gross Unrealized Losses	(5,394)	(1,186)
Estimated Fair Market Value	$ 248,441	$ 372,235
Weighted Average Interest Rate on Investments	2.08%	0.45%
Interest receivable	$ 1,200	$ 1,500
Investments due in 3 months or less:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	21,803	97,250
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(135)	(3)
Estimated Fair Market Value	21,668	97,247
Investments due in 4-12 months:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	173,833	25,054
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(4,019)	(42)
Estimated Fair Market Value	169,814	25,012
Investments due in 12 months or greater:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	58,128	251,096
Gross Unrealized Gains	71	21
Gross Unrealized Losses	(1,240)	(1,141)
Estimated Fair Market Value	56,959	249,976
Commercial paper | Investments due in 3 months or less:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		89,965
Gross Unrealized Gains		0
Gross Unrealized Losses		0
Estimated Fair Market Value		89,965
Corporate securities | Investments due in 3 months or less:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	21,803	7,285
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(135)	(3)
Estimated Fair Market Value	21,668	7,282
Corporate securities | Investments due in 4-12 months:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	173,833	25,054
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(4,019)	(42)
Estimated Fair Market Value	169,814	25,012
Corporate securities | Investments due in 12 months or greater:
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	58,128	251,096
Gross Unrealized Gains	71	21
Gross Unrealized Losses	(1,240)	(1,141)
Estimated Fair Market Value	$ 56,959	$ 249,976