v3.26.1
Schedule of Reported Financial Assets and Liabilities (Detail) - Fair Value, Measurements, Recurring - USD ($)
$ in Thousands
Jun. 28, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets [1] $ 517,926 $ 449,429
Liabilities [1] 2,045 928
Other Current Liabilities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Liabilities [1] 2,045 928
Cash and Cash Equivalents    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets [1] 349,538 293,751
Long-term marketable securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets [1] 162,274 126,256
Marketable securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets [1] 5,291 28,247
Prepayments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets [1] 823 1,175
Quoted Prices in Active Markets for Identical Instruments (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets 428,452 364,478
Liabilities 0 0
Quoted Prices in Active Markets for Identical Instruments (Level 1) | Other Current Liabilities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Liabilities 0 0
Quoted Prices in Active Markets for Identical Instruments (Level 1) | Cash and Cash Equivalents    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets 348,514 292,780
Quoted Prices in Active Markets for Identical Instruments (Level 1) | Long-term marketable securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets 79,938 71,698
Quoted Prices in Active Markets for Identical Instruments (Level 1) | Marketable securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets 0 0
Quoted Prices in Active Markets for Identical Instruments (Level 1) | Prepayments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets 0 0
Significant Other Observable Inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets 89,474 84,951
Liabilities 2,045 928
Significant Other Observable Inputs (Level 2) | Other Current Liabilities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Liabilities 2,045 928
Significant Other Observable Inputs (Level 2) | Cash and Cash Equivalents    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets 1,024 971
Significant Other Observable Inputs (Level 2) | Long-term marketable securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets 82,336 54,558
Significant Other Observable Inputs (Level 2) | Marketable securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets 5,291 28,247
Significant Other Observable Inputs (Level 2) | Prepayments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets $ 823 $ 1,175
[1] There were no financial assets or liabilities measured using significant unobservable inputs (Level 3) as of June 28, 2026 and December 31, 2025.