Quarterly report pursuant to Section 13 or 15(d)

Investments in Marketable Debt Securities, Available-for-Sale - Schedule of Amortized Cost and Fair Value of Marketable Securities, Available-for-Sale, by Type of Security (Detail)

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Investments in Marketable Debt Securities, Available-for-Sale - Schedule of Amortized Cost and Fair Value of Marketable Securities, Available-for-Sale, by Type of Security (Detail) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Marketable Securities [Line Items]    
Amortized Cost $ 258,149 $ 238,556
Fair Value 255,714 236,340
Short-term investments:    
Marketable Securities [Line Items]    
Amortized Cost 198,847 169,018
Allowance for Credit Losses 0 0
Gross Unrealized Gains 0 74
Gross Unrealized Losses (533) (211)
Fair Value 198,314 168,881
Long-term investments:    
Marketable Securities [Line Items]    
Amortized Cost 59,302 69,538
Allowance for Credit Losses 0 0
Gross Unrealized Gains 227 345
Gross Unrealized Losses (2,129) (2,424)
Fair Value 57,400 67,459
U.S. treasuries | Short-term investments:    
Marketable Securities [Line Items]    
Amortized Cost 78,335 91,951
Allowance for Credit Losses 0 0
Gross Unrealized Gains 0 60
Gross Unrealized Losses (330) (171)
Fair Value 78,005 91,840
U.S. treasuries | Long-term investments:    
Marketable Securities [Line Items]    
Amortized Cost 843 10,097
Allowance for Credit Losses 0 0
Gross Unrealized Gains 0 0
Gross Unrealized Losses (52) (245)
Fair Value 791 9,852
U.S. government sponsored entities | Long-term investments:    
Marketable Securities [Line Items]    
Amortized Cost 1,052 1,069
Allowance for Credit Losses 0 0
Gross Unrealized Gains 13 29
Gross Unrealized Losses (66) (58)
Fair Value 999 1,040
Corporate debt | Short-term investments:    
Marketable Securities [Line Items]    
Amortized Cost 120,512 77,067
Allowance for Credit Losses 0 0
Gross Unrealized Gains 0 14
Gross Unrealized Losses (203) (40)
Fair Value 120,309 77,041
Corporate debt | Long-term investments:    
Marketable Securities [Line Items]    
Amortized Cost 45,145 45,990
Allowance for Credit Losses 0 0
Gross Unrealized Gains 141 244
Gross Unrealized Losses (1,629) (1,669)
Fair Value 43,657 44,565
Asset-backed securities (“ABS”) and other | Long-term investments:    
Marketable Securities [Line Items]    
Amortized Cost 12,262 12,382
Allowance for Credit Losses 0 0
Gross Unrealized Gains 73 72
Gross Unrealized Losses (382) (452)
Fair Value $ 11,953 $ 12,002