v3.26.1
Fair Value Measurements - Summary of Significant Unobservable Inputs Used in Valuing Developmental Milestone Derivative Liabilities (Detail)
$ in Thousands
Jun. 30, 2026
USD ($)
yr
Dec. 31, 2025
USD ($)
yr
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Fair Value | $ $ 4,200 $ 9,200
Level 3 [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Fair Value | $ $ 4,200 $ 9,200
Level 3 [Member] | Probability of Achieving Certain Development Milestones [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Unobservable Input 0.60  
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   0.40
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   1
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   0.70
Level 3 [Member] | Volatility [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Unobservable Input 0.91 0.98
Level 3 [Member] | Volatility [Member] | Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Unobservable Input   0.98
Level 3 [Member] | Discount Rate [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Unobservable Input 0.041  
Level 3 [Member] | Discount Rate [Member] | Minimum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Unobservable Input   0.035
Level 3 [Member] | Discount Rate [Member] | Maximum [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Unobservable Input   0.037
Level 3 [Member] | Discount Rate [Member] | Average [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Unobservable Input   0.036
Level 3 [Member] | Timing of Achieving Certain Development Milestones [Member]    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Derivative Liabilities, Unobservable Input 2.3  
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   0.1
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   2.8
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   1.4