Cash, Cash Equivalents and Investments - Amortized Cost to Fair Value (Detail) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 405,758	$ 383,589
Gross Unrealized Gains	413	588
Gross Unrealized Losses	(5,317)	(10,555)
Fair Value, Total	400,854	373,622
Treasury Bills [Member]
Debt Securities, Available-for-sale [Line Items]
Fair Value, Total	45,634
Treasury Bills [Member] | Long-term investments [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	43,570	43,654
Gross Unrealized Gains	2	82
Gross Unrealized Losses	(425)	(213)
Fair Value, Total	43,147	43,523
Treasury Bills [Member] | Short-term Investments [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,501
Gross Unrealized Gains	0
Gross Unrealized Losses	(14)
Fair Value, Total	2,487
Asset-Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Fair Value, Total	13,314
Asset-Backed Securities [Member] | Long-term investments [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	13,131	16,773
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(554)	(1,010)
Fair Value, Total	12,577	15,763
Asset-Backed Securities [Member] | Short-term Investments [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	739	3,637
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(2)	(86)
Fair Value, Total	737	3,551
Corporate Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Fair Value, Total	340,916
Corporate Bonds [Member] | Long-term investments [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	288,332	189,326
Gross Unrealized Gains	408	506
Gross Unrealized Losses	(3,566)	(5,867)
Fair Value, Total	285,174	183,965
Corporate Bonds [Member] | Short-term Investments [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	56,472	128,150
Gross Unrealized Gains	3	0
Gross Unrealized Losses	(733)	(3,299)
Fair Value, Total	55,742	124,851
Sovereign Bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Fair Value, Total	990
Sovereign Bonds [Member] | Long-term investments [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		1,037
Gross Unrealized Gains		0
Gross Unrealized Losses		(58)
Fair Value, Total		979
Sovereign Bonds [Member] | Short-term Investments [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,013	1,012
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(23)	(22)
Fair Value, Total	$ 990	$ 990