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Financial Instruments - Fair Value Measured On A Recurring Basis (Detail) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Short-term investments $ 20,682 $ 35,304
Long-term investments 0 8,022
Assets measured at fair value 22,308 93,082
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Assets measured at fair value 1,626 49,756
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Assets measured at fair value 20,682 43,326
U.S. government agency bonds | Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Short-term investments 1,006 5,181
U.S. government agency bonds | Fair Value, Measurements, Recurring | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Short-term investments 0 0
U.S. government agency bonds | Fair Value, Measurements, Recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Short-term investments 1,006 5,181
U.S. government treasury bonds | Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Long-term investments   4,756
U.S. government treasury bonds | Fair Value, Measurements, Recurring | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Long-term investments   0
U.S. government treasury bonds | Fair Value, Measurements, Recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Long-term investments   4,756
Corporate bonds | Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Short-term investments 19,352 28,704
Long-term investments   2,568
Corporate bonds | Fair Value, Measurements, Recurring | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Short-term investments 0 0
Long-term investments   0
Corporate bonds | Fair Value, Measurements, Recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Short-term investments 19,352 28,704
Long-term investments   2,568
Municipal bonds | Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Short-term investments   700
Municipal bonds | Fair Value, Measurements, Recurring | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Short-term investments   0
Municipal bonds | Fair Value, Measurements, Recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Short-term investments   700
Asset-backed securities | Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Short-term investments 324 719
Long-term investments   698
Asset-backed securities | Fair Value, Measurements, Recurring | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Short-term investments 0 0
Long-term investments   0
Asset-backed securities | Fair Value, Measurements, Recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Short-term investments 324 719
Long-term investments   698
Money market funds | Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Cash equivalents 1,626 49,756
Money market funds | Fair Value, Measurements, Recurring | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Cash equivalents 1,626 49,756
Money market funds | Fair Value, Measurements, Recurring | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]    
Cash equivalents $ 0 $ 0