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FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS (Details)
 3 Months Ended 12 Months Ended
Mar. 31, 2023
USD ($)
Mar. 31, 2022
USD ($)
Dec. 31, 2023
USD ($)
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS      
Directors fees and expenses $ 37,384 $ 21,193  
Licensing fee incurred $ 32,679 $ 13,351  
Investor tax reporting cost     $ 1,000,000
UNG and the Related Public Funds      
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS      
Directors fees and expenses     209,000
UNG      
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS      
Monthly fee obligated to pay on average daily total net assets, maximum base fee 1,000,000,000 (as a percentage) 0.60    
Average daily total net assets $ 1,000,000,000    
Monthly fee obligated to pay on average daily total net assets (as a percentage) 0.50    
Directors fees and expenses     $ 1,210,000
Licensing Agreements      
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS      
Fee percentage 0.015%