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Fair Value Measurements - Schedule of Financial Assets And Liabilities Measured At Fair Value On A Recurring Basis (Detail) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Cash equivalents $ 25,617 $ 43,893  
Restricted cash equivalents 5,647 5,647  
Total 31,264 49,540 $ 32,894
Convertible notes 0 32,402  
Fair Value, Measurements, Recurring [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total 29,100 47,496  
Convertible notes 38,595 32,402  
Total 38,595 32,402  
Fair Value, Measurements, Recurring [Member] | Money Market Funds [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Cash equivalents 24,100 42,496  
Restricted cash equivalents 5,000 5,000  
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets (Level 1) [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total 29,100 47,496  
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets (Level 1) [Member] | Money Market Funds [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Cash equivalents 24,100 42,496  
Restricted cash equivalents 5,000 5,000  
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total 0 0  
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] | Money Market Funds [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Cash equivalents 0 0  
Fair Value, Measurements, Recurring [Member] | Significant Other Unobservable Inputs (Level 3) [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Convertible notes 38,595 32,402  
Total $ 38,595 $ 32,402