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FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS (Additional Information) (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Fees Paid And Related Party Transactions [Line Items]      
USCF Management Fee USO is contractually obligated to pay USCF a fee, which is paid monthly, equal to 0.45% per annum of average daily total net assets.    
Ongoing Registration Fees and Other Offering Expenses $ 339,981 $ 250,024 $ 1,350
Fees and expenses 373,311 298,255 181,613
Licensing fee incurred 504,895 387,957 106,574
Estimated investor tax reporting cost 2,200,000 1,400,000 600,000
USO And Related Public Funds [Member]      
Fees Paid And Related Party Transactions [Line Items]      
Fees and expenses 582,050 569,303 567,863
USO [Member]      
Fees Paid And Related Party Transactions [Line Items]      
Ongoing Registration Fees and Other Offering Expenses 339,981 250,024 1,350
Fees and expenses 373,311 298,255 181,613
Licensing fee incurred $ 504,895 $ 387,957 $ 106,574
Licensing Agreements [Member]      
Fees Paid And Related Party Transactions [Line Items]      
Fee percentage 0.015%