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CASH, CASH EQUIVALENTS AND INVESTMENTS - Schedule of Investments (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Dec. 31, 2021
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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

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- Definition 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). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 + Details
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