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ORGANIZATION AND BUSINESS (Details) - USD ($)
Dec. 06, 2007
Mar. 31, 2024
Dec. 31, 2023
Mar. 31, 2023
Dec. 31, 2022
Dec. 04, 2007
ORGANIZATION AND BUSINESS            
Number of registered shares           11,000,000
Net asset value per share $ 50.00 $ 39.99 $ 35.23 $ 33.77 $ 35.45  
Number of shares issued 300,000          
Value of shares issued $ 15,000,000          
Creation Baskets            
ORGANIZATION AND BUSINESS            
Number of shares per basket   50,000        
Fee paid by authorized purchasers for each order they place to create one or more creation baskets or to redeem one or more baskets   $ 350