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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