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Fair Value Measurements - Schedule of Financial Instruments Measured At Fair Value On A Recurring Basis (Detail) - Fair Value, Recurring [Member] - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total cash equivalents $ 2,078 $ 18,679
Total short-term investments 89,732 119,629
Total financial assets 91,810 138,308
Money Market Funds [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total cash equivalents 2,078 1,215
U.S. Government Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total cash equivalents   17,464
Total short-term investments 78,770 119,629
U.S. Government Agencies [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total short-term investments 10,962  
Fair Value, Inputs, Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total cash equivalents 2,078 1,215
Total financial assets 2,078 1,215
Fair Value, Inputs, Level 1 [Member] | Money Market Funds [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total cash equivalents 2,078 1,215
Fair Value, Inputs, Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total cash equivalents   17,464
Total short-term investments 89,732 119,629
Total financial assets 89,732 137,093
Fair Value, Inputs, Level 2 [Member] | U.S. Government Securities [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total cash equivalents   17,464
Total short-term investments 78,770 $ 119,629
Fair Value, Inputs, Level 2 [Member] | U.S. Government Agencies [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total short-term investments $ 10,962