v3.26.1
Summary of Significant Accounting Policies - Summary of Fair Value Estimates (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Jun. 30, 2025
Dec. 31, 2024
Assets        
Investment in Ether $ 1,223,358 $ 2,705,443 $ 2,836,933 $ 4,735,980
Level 1        
Assets        
Investment in Ether 1,223,358 2,705,443    
Level 2        
Assets        
Investment in Ether 0 0    
Level 3        
Assets        
Investment in Ether $ 0 $ 0