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Fair Value Measurements - Summary of Significant Unobservable Inputs Used in Valuing Developmental Milestone Derivative Liabilities (Detail)
$ in Thousands
Mar. 31, 2025
USD ($)
yr
Dec. 31, 2024
USD ($)
yr
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Fair Value | $ $ 4,800 $ 3,150
Level 3 [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Fair Value | $ $ 4,800 $ 3,150
Level 3 [Member] | Probability of Achieving Certain Development Milestones [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Unobservable Input 0.28 0.28
Level 3 [Member] | Probability of Achieving Certain Development Milestones [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Unobservable Input 0.70 0.70
Level 3 [Member] | Probability of Achieving Certain Development Milestones [Member] | Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Unobservable Input 0.49 0.49
Level 3 [Member] | Volatility [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Unobservable Input 0.90 0.85
Level 3 [Member] | Volatility [Member] | Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Unobservable Input 0.90 0.85
Level 3 [Member] | Discount Rate [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Unobservable Input 0.039 0.042
Level 3 [Member] | Discount Rate [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Unobservable Input 0.041 0.043
Level 3 [Member] | Discount Rate [Member] | Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Unobservable Input 0.04 0.043
Level 3 [Member] | Timing of Achieving Certain Development Milestones [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Unobservable Input 0.8 1
Level 3 [Member] | Timing of Achieving Certain Development Milestones [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Unobservable Input 3.4 3.7
Level 3 [Member] | Timing of Achieving Certain Development Milestones [Member] | Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Unobservable Input 2.1 2.3