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Fair Value Measurement - Summary of Assets Measured At Fair Value (Details)
$ in Thousands
Sep. 30, 2024
USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Total Investments $ 424,493
Investment in ether [Member]  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Total Investments 424,493
Fair Value, Inputs, Level 1 [Member]  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Total Investments 424,493
Fair Value, Inputs, Level 1 [Member] | Investment in ether [Member]  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Total Investments 424,493
Fair Value, Inputs, Level 2 [Member]  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Total Investments 0
Fair Value, Inputs, Level 2 [Member] | Investment in ether [Member]  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Total Investments 0
Fair Value, Inputs, Level 3 [Member]  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Total Investments 0
Fair Value, Inputs, Level 3 [Member] | Investment in ether [Member]  
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]  
Total Investments $ 0