v3.26.3
Schedule of Reported Financial Assets and Liabilities (Detail) - Fair Value, Measurements, Recurring - USD ($)
$ in Thousands
Sep. 27, 2026
Dec. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets [1] $ 625,589 $ 449,429
Liabilities [1] 1,732 928
Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAccruedLiabilitiesCurrent    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Liabilities [1] 1,732 928
Cash and Cash Equivalents    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets [1] 460,742 293,751
Long-term marketable securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets [1] 158,276 126,256
Marketable securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets [1] 5,847 28,247
Prepayments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets [1] 724 1,175
Quoted Prices in Active Markets for Identical Instruments (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets 542,447 364,478
Liabilities 0 0
Quoted Prices in Active Markets for Identical Instruments (Level 1) | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAccruedLiabilitiesCurrent    
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 460,742 292,780
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 81,705 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 83,142 84,951
Liabilities 1,732 928
Significant Other Observable Inputs (Level 2) | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAccruedLiabilitiesCurrent    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Liabilities 1,732 928
Significant Other Observable Inputs (Level 2) | Cash and Cash Equivalents    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets 0 971
Significant Other Observable Inputs (Level 2) | Long-term marketable securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets 76,571 54,558
Significant Other Observable Inputs (Level 2) | Marketable securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets 5,847 28,247
Significant Other Observable Inputs (Level 2) | Prepayments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Assets $ 724 $ 1,175
[1] There were no financial assets or liabilities measured using significant unobservable inputs (Level 3) as of September 27, 2026 and December 31, 2025.