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Financial Instruments - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
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 $ 459,795,000 $ 485,135,000  
Non controlling interest 0    
Gain (loss) from investment in affiliate (1,200,000)   $ (1,800,000)
Impairment of equity method investments 1,100,000   1,200,000
Realized gains (losses) 0 0 $ 0
Maximum [Member]      
Financial Instruments [Line Items]      
Gain (loss) from investment in affiliate   100,000  
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]      
Financial Instruments [Line Items]      
Total short-term investments (available for sale), Fair value 30,200,000 30,300,000  
Federal Agencies Debt Securities within Cash and Cash Equivalents [Member] | Level 2 [Member]      
Financial Instruments [Line Items]      
Total short-term investments (available for sale), Fair value $ 13,100,000 $ 44,900,000