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FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS (Additional Information) (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 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 $ 16,513 $ 20,488 $ 35,008 $ 38,642
Estimated investor tax reporting cost     1,000,000  
Estimated directors fees and expenses $ 14,400 $ 40,623 29,607 62,146
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     35,008 38,642
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     $ 121,724 $ 201,290