v3.26.3
Fair Value Measurements - Additional Information (Detail)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
USD ($)
shares
Sep. 30, 2026
USD ($)
shares
Jan. 26, 2026
Dec. 31, 2025
Sep. 30, 2021
shares
Schedule Of Changes In The Fair Value Of Warrant Liabilities [Line Items]          
Recognized net unrealized losses | $ $ 65.7 $ 15.5      
Price Volatility / Revenue Volatility [Member]          
Schedule Of Changes In The Fair Value Of Warrant Liabilities [Line Items]          
Business combination, contingent consideration, measurement input 0.30 0.30 0.25    
Discount Rate [Member]          
Schedule Of Changes In The Fair Value Of Warrant Liabilities [Line Items]          
Business combination, contingent consideration, measurement input 0.076 0.076 0.058    
Probability of Achievement [Member] | Minimum [Member] | Technical Milestones [Member]          
Schedule Of Changes In The Fair Value Of Warrant Liabilities [Line Items]          
Business combination, contingent consideration, measurement input     0.50    
Probability of Achievement [Member] | Maximum [Member] | Technical Milestones [Member]          
Schedule Of Changes In The Fair Value Of Warrant Liabilities [Line Items]          
Business combination, contingent consideration, measurement input     0.95    
Series A and Series B Private Warrants [Member]          
Schedule Of Changes In The Fair Value Of Warrant Liabilities [Line Items]          
Number of warrants or rights outstanding 79,053,330 79,053,330      
Class of warrant redeemed 0 0      
Series A and Series B Private Warrants [Member] | Price Volatility / Revenue Volatility [Member]          
Schedule Of Changes In The Fair Value Of Warrant Liabilities [Line Items]          
Expected stock-price volatility 0.90 0.90   0.95  
Commercial Contract on Investment Agreement [Member]          
Schedule Of Changes In The Fair Value Of Warrant Liabilities [Line Items]          
Revenue recognized from commercial contract | $ $ 7.0 $ 15.7      
Public Warrants [Member]          
Schedule Of Changes In The Fair Value Of Warrant Liabilities [Line Items]          
Number of warrants or rights outstanding 0 0     7,500,000