v3.25.1
Related Parties - Additional Information (Detail)
3 Months Ended 6 Months Ended 33 Months Ended
Mar. 31, 2025
USD ($)
Right
shares
Mar. 31, 2024
USD ($)
Right
Mar. 31, 2025
USD ($)
Right
shares
Mar. 31, 2024
USD ($)
Right
Mar. 31, 2025
USD ($)
Right
shares
Sep. 30, 2024
USD ($)
Right
shares
Jun. 30, 2022
USD ($)
Mar. 02, 2022
USD ($)
Related Party Transaction [Line Items]                
Shares of the Trust, held by related parties | shares 3,249,128   3,249,128   3,249,128 3,372,214    
Related party sponsor fee percentage     2.50%          
Number of incidental rights held | Right 0   0   0 0    
Number of Incidental Rights distributed | Right 0 0 0 0        
Additional trust expenses paid by sponsor $ 0 $ 0 $ 0 $ 0        
Maximum                
Related Party Transaction [Line Items]                
Common stock value, shares authorized               $ 10,000,000
Sponsor                
Related Party Transaction [Line Items]                
Related party maximum transaction in a fiscal year     600,000          
Sponsor's Fees 88,833 $ 38,440 145,300 $ 74,968        
Sponsor's Fee payable, related party $ 0   0   $ 0 $ 0    
Non Sponsor                
Related Party Transaction [Line Items]                
Related party maximum transaction in a fiscal year     $ 600,000          
DCG                
Related Party Transaction [Line Items]                
Number of shares purchased under authorization | shares         0      
DCG | Maximum                
Related Party Transaction [Line Items]                
Amount of the Trust, held by related parties             $ 10,000.00