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Cash and Investments in Marketable Securities - Portfolio of Cash and Investments in Marketable Securities (Detail) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Gross Unrealized Losses   $ (1,800)
Cash $ 5,428 8,798
Total cash and investments in marketable securities 372,658 504,977
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Amortized Cost 305,435  
Gross Unrealized Gains 0  
Gross Unrealized Losses (249)  
Fair Value 305,186 427,726
Level 2 | Corporate notes and bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Amortized Cost 11,251  
Gross Unrealized Gains 0  
Gross Unrealized Losses (20)  
Fair Value 11,231 83,522
Level 2 | Corporate commercial paper    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Amortized Cost 294,184  
Gross Unrealized Gains 0  
Gross Unrealized Losses (229)  
Fair Value 293,955 344,204
Level 2 | Certificates of deposit    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, fair value disclosure 15,186 21,399
Level 1 | Money market funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, fair value disclosure $ 46,858 $ 47,054