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FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS (Additional Information) (Details) - USD ($)
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Fees Paid and Related Party Transactions [Line Items]    
USCF Management Fee UNG. For these services, UNG is contractually obligated to pay USCF a fee, which is paid monthly, that is equal to 0.60% per annum of average daily total net assets of $1,000,000,000 or less and 0.50% per annum of average daily total net assets that are greater than $1,000,000,000  
Licensing fee incurred $ 18,495 $ 18,154
Estimated investor tax reporting cost 900,000  
Estimated directors fees and expenses 15,207 21,523
USNG and the Related Public Funds [Member]    
Fees Paid and Related Party Transactions [Line Items]    
Estimated directors fees and expenses 539,350  
UNITED STATES GAS FUND LP [Member]    
Fees Paid and Related Party Transactions [Line Items]    
Licensing fee incurred 18,495 18,154
Estimated directors fees and expenses $ 62,300  
First $1,000,000,000 of combined net assets of the funds [Member]    
Fees Paid and Related Party Transactions [Line Items]    
Basis Amount For Fee Percentage 1,000,000,000  
Combined net assets above $1,000,000,000 [Member]    
Fees Paid and Related Party Transactions [Line Items]    
Basis Amount For Fee Percentage 1,000,000,000  
Licensing Agreements [Member]    
Fees Paid and Related Party Transactions [Line Items]    
Fee percentage 0.015%  
United States Oil Fund LP [Member]    
Fees Paid and Related Party Transactions [Line Items]    
Ongoing Registration Fees and Other Offering Expenses $ 82,458 $ 100,645