XML 39 R23.htm IDEA: XBRL DOCUMENT v3.4.0.3
FEES PAID BY THE FUND AND RELATED PARTY TRANSACTIONS - (Additional Information) (Details) - USD ($)
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Fees Paid and Related Party Transactions [Line Items]    
USCF Management Fee UNL is contractually obligated to pay USCF a fee, which is paid monthly, that is equal to 0.75% per annum of average daily total net assets.  
Estimated directors fees and expenses $ 530 $ 1,032
Assets basis for determining fee percentage a licensing fee that is equal to 0.015% on all net assets  
Licensing fee incurred $ 451 649
Expense waiver (Note 3) 23,616 $ 17,835
Future Period - for the year ending December 31, 2016 [Member]    
Fees Paid and Related Party Transactions [Line Items]    
Estimated investor tax reporting cost $ 76,000  
Future Period - for the year ending December 31, 2016 [Member] | Maximum [Member]    
Fees Paid and Related Party Transactions [Line Items]    
Costs and expenses annual limit for reimbursement 0.15%  
UNL [Member]    
Fees Paid and Related Party Transactions [Line Items]    
Estimated directors fees and expenses $ 1,600  
UNL [Member] | Related Public Funds [Member]    
Fees Paid and Related Party Transactions [Line Items]    
Estimated directors fees and expenses $ 554,800