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FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS (Details)
 3 Months Ended 12 Months Ended
Mar. 31, 2022
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2022
USD ($)
Fees Paid and Related Party Transactions [Line Items]      
Investor tax reporting cost $ 700,000    
Directors fees and expenses 21,193 $ 18,891 $ 99,000
Licensing fee incurred $ 13,351 13,024  
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    
Monthly fee obligated to pay on average daily total net assets (as a percentage) 0.50    
Ongoing Registration Fees and Other Offering Expenses $ 0 $ 81,000  
Licensing Agreements [Member]      
Fees Paid and Related Party Transactions [Line Items]      
Fee percentage 0.015%