CASH, CASH EQUIVALENTS AND INVESTMENTS - Schedule of Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Short-term Investments [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	$ 441,440	$ 351,299
Available-for-sale Securities, Gross Unrealized Gains	8	3
Available-for-sale Securities, Gross Unrealized Losses	(1,999)	(108)
Available-for-sale Securities, Fair Value Disclosure	439,449	351,194
Long-term Investments [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	186,466	159,692
Available-for-sale Securities, Gross Unrealized Gains	7	10
Available-for-sale Securities, Gross Unrealized Losses	(5,339)	(134)
Available-for-sale Securities, Fair Value Disclosure	181,134	159,568
Certificates of Deposit [Member] \| Short-term Investments [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis		240
Available-for-sale Securities, Gross Unrealized Gains		0
Available-for-sale Securities, Gross Unrealized Losses		0
Available-for-sale Securities, Fair Value Disclosure		240
Corporate Bonds [Member] \| Short-term Investments [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	257,133	226,448
Available-for-sale Securities, Gross Unrealized Gains	0	3
Available-for-sale Securities, Gross Unrealized Losses	(791)	(97)
Available-for-sale Securities, Fair Value Disclosure	256,342	226,354
Corporate Bonds [Member] \| Long-term Investments [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	1,768
Available-for-sale Securities, Gross Unrealized Gains	0
Available-for-sale Securities, Gross Unrealized Losses	(204)
Available-for-sale Securities, Fair Value Disclosure	1,564
U.S. Government Bonds [Member] \| Short-term Investments [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	184,307	124,611
Available-for-sale Securities, Gross Unrealized Gains	8	0
Available-for-sale Securities, Gross Unrealized Losses	(1,208)	(11)
Available-for-sale Securities, Fair Value Disclosure	183,107	124,600
U.S. Government Bonds [Member] \| Long-term Investments [Member]
Schedule Of Available For Sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	184,698	159,692
Available-for-sale Securities, Gross Unrealized Gains	7	10
Available-for-sale Securities, Gross Unrealized Losses	(5,135)	(134)
Available-for-sale Securities, Fair Value Disclosure	$ 179,570	$ 159,568

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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