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FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS (Details)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2022
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
Jun. 30, 2021
USD ($)
Dec. 31, 2022
USD ($)
Fees Paid and Related Party Transactions [Line Items]          
Investor tax reporting cost         $ 800,000
Directors fees and expenses $ 26,402 $ 19,092 $ 47,595 $ 37,983 99,000
Licensing fee incurred 18,318 $ 9,733 $ 31,669 22,757  
UNG and the Related Public Funds          
Fees Paid and Related Party Transactions [Line Items]          
Directors fees and expenses         $ 1,258,000
UNG          
Fees Paid and Related Party Transactions [Line Items]          
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   $ 1,000,000,000    
Monthly fee obligated to pay on average daily total net assets (as a percentage)     0.50    
Ongoing Registration Fees and Other Offering Expenses     $ 0 $ 103,290  
Licensing Agreements          
Fees Paid and Related Party Transactions [Line Items]          
Fee percentage     0.015%