Financial Instruments - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Financial Instruments [Line Items]
Period cash equivalents and short-term investments have been in continuous unrealized gain (loss) position, years, maximum		1 year
Total short-term investments (available for sale), Fair value	$ 511,211,000	$ 511,211,000	$ 459,795,000
Gain on sale of investment in equity affiliate	$ 1,000,000	1,038,000
Realized gains (losses)		$ 0	$ 0	$ 0