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FINANCIAL INSTRUMENTS - Summary of Cash, Cash Equivalents and Investments (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | $ 832,548 | $ 777,083
Gross unrealized gains | 80 | 16
Gross unrealized losses | (2,766) | (4,781)
Fair Value | 829,862 | 772,318
Short-term restricted cash | 300 | 300
Long-term restricted cash | 2,422 | 2,922
Cash and cash equivalents |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 209,279 | 325,144
Gross unrealized gains | 17 | 6
Gross unrealized losses | (9) | (61)
Fair Value | 209,287 | 325,089
Commercial paper |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 94,247 | 127,626
Gross unrealized gains | 0 | 9
Gross unrealized losses | (123) | (333)
Fair Value | 94,124 | 127,302
Corporate debt securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 74,930 | 49,998
Gross unrealized gains | 6 | 0
Gross unrealized losses | (352) | (507)
Fair Value | 74,584 | 49,491
U.S. government & agency securities |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 454,092 | 274,315
Gross unrealized gains | 57 | 1
Gross unrealized losses | (2,282) | (3,880)
Fair Value | 451,867 | 270,436
Investments: |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Amortized Cost | 623,269 | 451,939
Gross unrealized gains | 63 | 10
Gross unrealized losses | (2,757) | (4,720)
Fair Value | $ 620,575 | $ 447,229

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