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CONTRACTS AND AGREEMENTS (Additional Information) (Details)
3 Months Ended
Mar. 31, 2019
USD ($)
$ / Basket
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]  
Annual transfer agency services fee $ 20,000
Management fee paid to SummerHaven by USCF plus an annual fee of 0.06% of the average daily total net assets of each Trust Series.
Management fee description for USCI, the fee was equal to the percentage fees paid to USCF minus 0.14%, with that result multiplied by 0.5, minus 0.06% to arrive at the actual fee paid. Prior to May 1, 2018, for CPER, the fee was equal to the percentage fees paid to USCF minus 0.18%, with that result multiplied by 0.5, minus 0.6% to arrive at the actual fee paid.
Licensing Agreements [Member]  
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]  
Annual licensing fee $ 15,000
Maximum [Member]  
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]  
Transaction fees per transaction | $ / Basket 15
Commissions per round-turn trade, including applicable exchange and NFA fees for Futures Contracts and options on Futures Contracts | $ / Basket 8
Minimum [Member]  
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]  
Base amount for determining fee percentage $ 75,000
Transaction fees per transaction | $ / Basket 7
Commissions per round-turn trade, including applicable exchange and NFA fees for Futures Contracts and options on Futures Contracts | $ / Basket 7
For the first $500 million [Member]  
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]  
Fee percentage 0.06%
For the first $500 million [Member] | Maximum [Member]  
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]  
Base amount for determining fee percentage $ 500,000,000
Combined net assets greater than $500 million but less than $1 billion [Member]  
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]  
Fee percentage 0.0465%
Combined net assets greater than $500 million but less than $1 billion [Member] | Maximum [Member]  
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]  
Base amount for determining fee percentage $ 1,000,000,000
Combined net assets greater than $500 million but less than $1 billion [Member] | Minimum [Member]  
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]  
Base amount for determining fee percentage $ 500,000,000
Combined net assets exceed $1 billion [Member]  
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]  
Fee percentage 0.035%
Combined net assets exceed $1 billion [Member] | Minimum [Member]  
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]  
Base amount for determining fee percentage $ 1,000,000,000
Marketing Agreement [Member] | Maximum [Member]  
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]  
Fee percentage 10.00%
Marketing Agreement [Member] | Minimum [Member]  
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]  
Fee percentage 0.04%
Marketing Agreement [Member] | On each Trust Series' assets up to 3 billion [Member]  
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]  
Fee percentage 0.06%
Marketing Agreement [Member] | On each Trust Series' assets up to 3 billion [Member] | Maximum [Member]  
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]  
Base amount for determining fee percentage $ 3,000,000,000
Marketing Agreement [Member] | On each Trust Series' assets in excess of $3 billion [Member] | Maximum [Member]  
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]  
Base amount for determining fee percentage $ 3,000,000,000