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FAIR VALUE MEASUREMENTS AND FINANCIAL INSTRUMENTS - Schedule of Financial Assets Subject to Fair Value Measurements on a Recurring Basis by Level Within the Fair Value Hierarchy (Details) - USD ($) $ in Thousands | Jun. 30, 2026 | Dec. 31, 2025
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents, amortized cost | $ 732,601 | $ 997,827
Gross Unrealized Gains | 0 | 7,097
Gross Unrealized Losses | (13) | 0
Short-Term Investments | 28,712 | 631,093
Long-Term Investments |  | 487,982
Total, amortized cost | 761,326 | 2,109,805
Total, estimated fair value | 761,313 | 2,116,902
Related Party |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Short-Term Investments | 0 | 50,000
Level 1: |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents, amortized cost | 289,329 | 235,750
Amortized cost | 313,247 | 810,909
Gross Unrealized Gains | 0 | 3,655
Gross Unrealized Losses | (2) | 0
Estimated Fair Value | 313,245 | 814,564
Short-Term Investments | 23,916 | 398,011
Long-Term Investments |  | 180,803
Level 2: |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents, amortized cost | 65,144 | 0
Amortized cost | 69,951 | 536,819
Gross Unrealized Gains | 0 | 3,442
Gross Unrealized Losses | (11) | 0
Estimated Fair Value | 69,940 | 540,261
Short-Term Investments | 4,796 | 233,082
Long-Term Investments |  | 307,179
U.S. Treasury securities | Level 1: |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents, amortized cost | 198,616 | 0
Amortized cost | 222,534 | 575,159
Gross Unrealized Gains | 0 | 3,655
Gross Unrealized Losses | (2) | 0
Estimated Fair Value | 222,532 | 578,814
Short-Term Investments | 23,916 | 398,011
Long-Term Investments |  | 180,803
Certificates of deposit | Level 2: |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents, amortized cost | 0 |
Amortized cost | 4,803 |
Gross Unrealized Gains | 0 |
Gross Unrealized Losses | (7) |
Estimated Fair Value | 4,796 |
Short-Term Investments | 4,796 |
Time deposits | Level 2: |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents, amortized cost |  | 0
Amortized cost |  | 65,000
Gross Unrealized Gains |  | 0
Gross Unrealized Losses |  | 0
Estimated Fair Value |  | 65,000
Short-Term Investments |  | 65,000
Long-Term Investments |  | 0
Time deposits | Level 2: | Related Party | GIB |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Short-term investments | 0 | 50,000
Commercial paper | Level 2: |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents, amortized cost | 65,144 |
Amortized cost | 65,148 |
Gross Unrealized Gains | 0 |
Gross Unrealized Losses | (4) |
Estimated Fair Value | 65,144 |
Short-Term Investments | 0 |
Corporate debt securities | Level 2: |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents, amortized cost |  | 0
Amortized cost |  | 471,819
Gross Unrealized Gains |  | 3,442
Gross Unrealized Losses |  | 0
Estimated Fair Value |  | 475,261
Short-Term Investments |  | 168,082
Long-Term Investments |  | 307,179
Cash |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents, amortized cost | 378,128 | 762,077
Cash, estimated fair value | 378,128 | 762,077
Short-Term Investments | 0 | 0
Long-Term Investments |  | 0
Money market funds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Cash and cash equivalents, amortized cost | 90,713 | 235,750
Cash, estimated fair value | 90,713 | 235,750
Short-Term Investments | $ 0 | 0
Long-Term Investments |  | $ 0

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