v3.25.1
Related Party Transactions - Disbursements to Trustees (Detail) - USD ($)
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Related Party Transaction [Line Items]    
Trustee Fees and Expenses $ 8,125 $ 5,625
Individual Trustee Fees [Member]    
Related Party Transaction [Line Items]    
Trustee Fees and Expenses 625 1,250
Corporate Trustee Fees [Member]    
Related Party Transaction [Line Items]    
Trustee Fees and Expenses 625 625
Transfer Agent Registrar Fees [Member]    
Related Party Transaction [Line Items]    
Trustee Fees and Expenses [1] $ 6,875 $ 3,750
[1] These services are performed by the Corporate Trustee.