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Fair Value Measurements and Financial Instruments - Financial Assets and Liabilities Measured at Fair Value (Detail) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value $ 8,083 $ 10,582
Liabilities, fair value 10,762 17,557
Long-term Receivable    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value 4,900 4,722
Money Market Funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value [1] 3,183 5,860
CVR Derivative Liability, Noncurrent    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Liabilities, fair value 4,900 4,722
Warrant Liability, Noncurrent    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Liabilities, fair value 5,862 12,835
Fair Value, Inputs, Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value 3,183 5,860
Fair Value, Inputs, Level 1 | Money Market Funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value [1] 3,183 5,860
Fair Value, Inputs, Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value 4,900 4,722
Liabilities, fair value 10,762 17,557
Fair Value, Inputs, Level 3 | Long-term Receivable    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value 4,900 4,722
Fair Value, Inputs, Level 3 | CVR Derivative Liability, Noncurrent    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Liabilities, fair value 4,900 4,722
Fair Value, Inputs, Level 3 | Warrant Liability, Noncurrent    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Liabilities, fair value $ 5,862 $ 12,835
[1] Included in cash and cash equivalents on the accompanying condensed consolidated balance sheets.