v3.26.1
Summary of Significant Accounting Policies - Summary of Fair Value Estimates (Detail) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Jun. 30, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Investment in ZEN $ 3,778 $ 8,673 $ 7,096 $ 25,713
Investment, Type [Extensible Enumeration] Investment in ZEN [Member] Investment in ZEN [Member] Investment in ZEN [Member]  
Level 1        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Investment in ZEN $ 3,778 $ 8,673    
Investment, Type [Extensible Enumeration] Investment in ZEN [Member] Investment in ZEN [Member]    
Level 2        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Investment in ZEN $ 0 $ 0    
Investment, Type [Extensible Enumeration] Investment in ZEN [Member] Investment in ZEN [Member]    
Level 3        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Investment in ZEN $ 0 $ 0    
Investment, Type [Extensible Enumeration] Investment in ZEN [Member] Investment in ZEN [Member]