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FAIR VALUE MEASUREMENTS - Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands | Jun. 30, 2026 | Dec. 31, 2025
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Long-term U.S. Government bonds | $ 411,120 | $ 377,034
Short-term U.S. Government bonds | 3,051 | 3,070
Cash equivalents | 120,563 | 138,353
Fair Value, Measurements, Recurring [Member] | Reported Value Measurement [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Long-term U.S. Government bonds | 383,229 | 352,987
Short-term U.S. Government bonds | 345,019 | 455,398
Cash equivalents | 44,134 | 27,461
Short-term marketable equity securities | 1,256 | 8,606
Convertible notes | 2,000 | 2,000
Fair Value, Measurements, Recurring [Member] | Reported Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Short-term marketable equity securities | 0 |
Convertible notes | 2,000 | 2,000
Fair Value, Measurements, Recurring [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Long-term U.S. Government bonds | 383,229 | 352,987
Short-term U.S. Government bonds | 345,019 | 455,398
Cash equivalents | 44,134 | 27,461
Short-term marketable equity securities | $ 1,256 | $ 8,606

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