United States Copper Index Fund (CPER) 10-Q7 Aug 172017 Q2 Quarterly reportFinancial data

Company Profile

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
Document And Entity Information - shares	Jun. 30, 2017	Aug. 02, 2017
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q2
Entity Registrant Name	United States Commodity Index Funds Trust
Entity Central Index Key	1,479,247
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Trading Symbol	USCI
Entity Common Stock, Shares Outstanding		13,050,000
United States Commodity Index Fund [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		12,400,000
United States Copper Index Fund [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		550,000
United States Agriculture Index Fund [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		100,000

Condensed Statements of Financi

Condensed Statements of Financial Condition - USD ($)	Jun. 30, 2017	Dec. 31, 2016
Assets
Cash and cash equivalents (Notes 2 and 6)	$ 448,559,116	$ 608,435,196
Equity in trading accounts:
Cash and cash equivalents	57,822,962	40,511,991
Unrealized gain (loss) on open commodity futures contracts	(11,962,448)	2,054,335
Interest receivable	0	1,261
Receivable from Sponsor (Note 4)	47,640	147,813
Directors' fees and insurance receivable	11,357	0
ETF transaction fees receivable	0	350
Total assets	494,478,627	651,150,946
Liabilities and Capital
Payable for shares redeemed	0	6,015,383
Management fees payable (Note 4)	325,879	450,330
Professional fees payable	324,343	706,759
Brokerage commissions payable	43,305	54,015
Directors' fees and insurance payable	0	6,226
Total liabilities	693,527	7,232,713
Commitments and Contingencies (Notes 4, 5 and 6)
Capital
Sponsor	0	0
Shareholders	493,785,100	643,918,233
Total Capital	493,785,100	643,918,233
Total liabilities and capital	$ 494,478,627	$ 651,150,946
Shares outstanding	13,300,000	16,350,000
United States Commodity Index Fund [Member]
Assets
Cash and cash equivalents (Notes 2 and 6)	$ 434,907,741	$ 601,266,026
Equity in trading accounts:
Cash and cash equivalents	56,851,214	40,050,520
Unrealized gain (loss) on open commodity futures contracts	(12,350,339)	2,055,460
Interest receivable	0	1,261
Directors' fees and insurance receivable	9,990	0
ETF transaction fees receivable	0	350
Total assets	479,418,606	643,373,617
Liabilities and Capital
Payable for shares redeemed	0	6,015,383
Management fees payable (Note 4)	317,032	445,163
Professional fees payable	270,888	560,068
Brokerage commissions payable	43,305	54,015
Directors' fees and insurance payable	0	6,164
Total liabilities	631,225	7,080,793
Commitments and Contingencies (Notes 4, 5 and 6)
Capital
Sponsor	0	0
Shareholders	478,787,381	636,292,824
Total Capital	478,787,381	636,292,824
Total liabilities and capital	$ 479,418,606	$ 643,373,617
Shares outstanding	12,450,000	15,900,000
Net asset value per share	$ 38.46	$ 40.02
Market value per share	$ 38.49	$ 40
United States Copper Index Fund [Member]
Assets
Cash and cash equivalents (Notes 2 and 6)	$ 11,978,901	$ 5,387,655
Equity in trading accounts:
Cash and cash equivalents	775,887	253,165
Unrealized gain (loss) on open commodity futures contracts	385,713	88,575
Receivable from Sponsor (Note 4)	25,086	75,640
Directors' fees and insurance receivable	574	0
Total assets	13,166,161	5,805,035
Liabilities and Capital
Management fees payable (Note 4)	6,789	3,038
Professional fees payable	30,688	77,296
Directors' fees and insurance payable	0	47
Total liabilities	37,477	80,381
Commitments and Contingencies (Notes 4, 5 and 6)
Capital
Sponsor	0	0
Shareholders	13,128,684	5,724,654
Total Capital	13,128,684	5,724,654
Total liabilities and capital	$ 13,166,161	$ 5,805,035
Shares outstanding	750,000	350,000
Net asset value per share	$ 17.5	$ 16.36
Market value per share	$ 17.46	$ 16.35
United States Agriculture Index Fund [Member]
Assets
Cash and cash equivalents (Notes 2 and 6)	$ 1,672,474	$ 1,781,515
Equity in trading accounts:
Cash and cash equivalents	195,861	208,306
Unrealized gain (loss) on open commodity futures contracts	2,178	(89,700)
Interest receivable	793	0
Receivable from Sponsor (Note 4)	22,554	72,173
Total assets	1,893,860	1,972,294
Liabilities and Capital
Management fees payable (Note 4)	2,058	2,129
Professional fees payable	22,767	69,395
Directors' fees and insurance payable	0	15
Total liabilities	24,825	71,539
Commitments and Contingencies (Notes 4, 5 and 6)
Capital
Sponsor	0	0
Shareholders	1,869,035	1,900,755
Total Capital	1,869,035	1,900,755
Total liabilities and capital	$ 1,893,860	$ 1,972,294
Shares outstanding	100,000	100,000
Net asset value per share	$ 18.69	$ 19.01
Market value per share	$ 17.56	$ 18.07

Condensed Schedule of Investmen

Condensed Schedule of Investments	Jun. 30, 2017USD ($)Contract
United States Commodity Index Fund [Member]
Number of Contracts \| Contract	13,543	[1]
Unrealized Gain (Loss) on Open Commodity Contracts	$ (12,350,339)	[1]
% of Capital	(2.58%)	[1]
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member]
Number of Contracts \| Contract	5,359
Unrealized Gain (Loss) on Open Commodity Contracts	$ (13,368,509)
% of Capital	(2.79%)
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| LME Nickel Futures LN July 2017 contracts, expiring July 2017 [Member]
Number of Contracts \| Contract	695
Unrealized Gain (Loss) on Open Commodity Contracts	$ (8,858,084)
% of Capital	(1.85%)
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| LME Nickel Futures LN August 2017 contracts, expiring August 2017 [Member]
Number of Contracts \| Contract	605
Unrealized Gain (Loss) on Open Commodity Contracts	$ 308,683
% of Capital	0.07%
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| LME Lead Futures LL September 2017 contracts, expiring September 2017 [Member]
Number of Contracts \| Contract	809
Unrealized Gain (Loss) on Open Commodity Contracts	$ (655,469)
% of Capital	(0.14%)
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| LME Tin Futures LT September 2017 contracts, expiring September 2017 [Member]
Number of Contracts \| Contract	413
Unrealized Gain (Loss) on Open Commodity Contracts	$ 430,570
% of Capital	0.09%
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| LME Tin Futures LT November 2017 contracts, expiring November 2017 [Member]
Number of Contracts \| Contract	414
Unrealized Gain (Loss) on Open Commodity Contracts	$ (309,035)
% of Capital	(0.06%)
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| LME Zinc Futures LX November 2017 contracts, expiring November 2017 [Member]
Number of Contracts \| Contract	605
Unrealized Gain (Loss) on Open Commodity Contracts	$ (923,912)
% of Capital	(0.19%)
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-US Cotton #2 Futures CT December 2017 contracts, expiring December 2017 [Member]
Number of Contracts \| Contract	992
Unrealized Gain (Loss) on Open Commodity Contracts	$ (2,565,225)
% of Capital	(0.54%)
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| LME Aluminum Futures LA February 2018 contracts, expiring February 2018 [Member]
Number of Contracts \| Contract	826
Unrealized Gain (Loss) on Open Commodity Contracts	$ (796,037)
% of Capital	(0.17%)
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member]
Number of Contracts \| Contract	6,554
Unrealized Gain (Loss) on Open Commodity Contracts	$ 605,821
% of Capital	0.12%
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| NYMEX RBOB Gasoline Futures RB October 2017 contracts, expiring September 2017 [Member]
Number of Contracts \| Contract	593
Unrealized Gain (Loss) on Open Commodity Contracts	$ (1,567,541)
% of Capital	(0.33%)
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Lean Hogs Futures LH October 2017 contracts, expiring October 2017 [Member]
Number of Contracts \| Contract	1,241
Unrealized Gain (Loss) on Open Commodity Contracts	$ 1,112,557
% of Capital	0.23%
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| COMEX Gold Futures GC October 2017 contracts, expiring October 2017 [Member]
Number of Contracts \| Contract	268
Unrealized Gain (Loss) on Open Commodity Contracts	$ (120,600)
% of Capital	(0.03%)
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Live Cattle Futures LC October 2017 contracts, expiring October 2017 [Member]
Number of Contracts \| Contract	744
Unrealized Gain (Loss) on Open Commodity Contracts	$ (521,170)
% of Capital	(0.11%)
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Soybean Oil Futures BO December 2017 contracts, expiring December 2017 [Member]
Number of Contracts \| Contract	1,719
Unrealized Gain (Loss) on Open Commodity Contracts	$ 584,358
% of Capital	0.12%
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| COMEX Copper Futures HG December 2017 contracts, expiring December 2017 [Member]
Number of Contracts \| Contract	501
Unrealized Gain (Loss) on Open Commodity Contracts	$ (1,888)
% of Capital	0.00%	[2]
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Feeder Cattle Futures FC January 2018 contracts, expiring January 2018 [Member]
Number of Contracts \| Contract	490
Unrealized Gain (Loss) on Open Commodity Contracts	$ 423,125
% of Capital	0.09%
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| NYMEX Natural Gas Futures NG February 2018 contracts, expiring January 2018 [Member]
Number of Contracts \| Contract	998
Unrealized Gain (Loss) on Open Commodity Contracts	$ 696,980
% of Capital	0.15%
United States Commodity Index Fund [Member] \| Open Futures Contracts Short [Member] \| Foreign [Member]
Number of Contracts \| Contract	1,630	[3]
Unrealized Gain (Loss) on Open Commodity Contracts	$ 412,349	[3]
% of Capital	0.09%	[3]
United States Commodity Index Fund [Member] \| Open Futures Contracts Short [Member] \| Foreign [Member] \| LME Nickel Futures LN July 2017 contracts, expiring July 2017 [Member]
Number of Contracts \| Contract	695	[3]
Unrealized Gain (Loss) on Open Commodity Contracts	$ 3,345,169	[3]
% of Capital	0.70%	[3]
United States Commodity Index Fund [Member] \| Open Futures Contracts Short [Member] \| Foreign [Member] \| LME Lead Futures LL September 2017 contracts, expiring September 2017 [Member]
Number of Contracts \| Contract	223	[3]
Unrealized Gain (Loss) on Open Commodity Contracts	$ (292,530)	[3]
% of Capital	(0.06%)	[3]
United States Commodity Index Fund [Member] \| Open Futures Contracts Short [Member] \| Foreign [Member] \| LME Tin Futures LT September 2017 contracts, expiring September 2017 [Member]
Number of Contracts \| Contract	413	[3]
Unrealized Gain (Loss) on Open Commodity Contracts	$ (2,198,759)	[3]
% of Capital	(0.46%)	[3]
United States Commodity Index Fund [Member] \| Open Futures Contracts Short [Member] \| Foreign [Member] \| LME Tin Futures LT November 2017 contracts, expiring November 2017 [Member]
Number of Contracts \| Contract	65	[3]
Unrealized Gain (Loss) on Open Commodity Contracts	$ (7,682)	[3]
% of Capital	0.00%	[2],[3]
United States Commodity Index Fund [Member] \| Open Futures Contracts Short [Member] \| Foreign [Member] \| LME Zinc Futures LX November 2017 contracts, expiring November 2017 [Member]
Number of Contracts \| Contract	116	[3]
Unrealized Gain (Loss) on Open Commodity Contracts	$ (410,679)	[3]
% of Capital	(0.09%)	[3]
United States Commodity Index Fund [Member] \| Open Futures Contracts Short [Member] \| Foreign [Member] \| LME Aluminum Futures LA February 2018 contracts, expiring February 2018 [Member]
Number of Contracts \| Contract	118	[3]
Unrealized Gain (Loss) on Open Commodity Contracts	$ (23,170)	[3]
% of Capital	0.00%	[2],[3]
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member]
Market Value	$ 376,592,713
% of Capital	78.66%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.62%, 7/06/2017 [Member]
Principal Amount	$ 40,000,000
Market Value	$ 39,996,583
% of Capital	8.35%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.60%, 7/27/2017 [Member]
Principal Amount	$ 20,000,000
Market Value	$ 19,991,405
% of Capital	4.18%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S .Treasury Bills 0.88%, 8/03/2017 [Member]
Principal Amount	$ 5,000,000
Market Value	$ 4,995,990
% of Capital	1.04%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.65%, 8/17/2017 [Member]
Principal Amount	$ 5,000,000
Market Value	$ 4,995,757
% of Capital	1.04%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.76%, 8/31/2017 [Member]
Principal Amount	$ 15,000,000
Market Value	$ 14,980,810
% of Capital	3.13%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S .Treasury Bills 0.84%, 9/07/2017 [Member]
Principal Amount	$ 10,000,000
Market Value	$ 9,984,133
% of Capital	2.09%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S .Treasury Bills 0.89%, 9/21/2017 [Member]
Principal Amount	$ 10,000,000
Market Value	$ 9,979,728
% of Capital	2.08%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.89%, 9/28/2017 [Member]
Principal Amount	$ 15,000,000
Market Value	$ 14,966,996
% of Capital	3.13%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.96%, 10/05/2017 [Member]
Principal Amount	$ 5,000,000
Market Value	$ 4,987,267
% of Capital	1.04%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.92%, 10/12/2017 [Member]
Principal Amount	$ 10,000,000
Market Value	$ 9,973,821
% of Capital	2.08%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.91%, 10/19/2017 [Member]
Principal Amount	$ 18,000,000
Market Value	$ 17,950,225
% of Capital	3.75%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S .Treasury Bills 0.95%, 10/26/2017 [Member]
Principal Amount	$ 30,000,000
Market Value	$ 29,907,375
% of Capital	6.25%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.97%, 11/02/2017 [Member]
Principal Amount	$ 25,000,000
Market Value	$ 24,916,903
% of Capital	5.20%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 1.01%, 11/09/2017 [Member]
Principal Amount	$ 10,000,000
Market Value	$ 9,963,429
% of Capital	2.08%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.98%, 11/16/2017 [Member]
Principal Amount	$ 25,000,000
Market Value	$ 24,906,083
% of Capital	5.20%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 1.05%, 11/24/2017 [Member]
Principal Amount	$ 10,000,000
Market Value	$ 9,957,619
% of Capital	2.08%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 1.08%, 12/07/2017 [Member]
Principal Amount	$ 10,000,000
Market Value	$ 9,952,742
% of Capital	2.08%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 1.09%, 12/14/2017 [Member]
Principal Amount	$ 25,000,000
Market Value	$ 24,875,500
% of Capital	5.20%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 1.11%, 12/21/2017 [Member]
Principal Amount	$ 10,000,000
Market Value	$ 9,947,139
% of Capital	2.08%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 1.10%, 12/28/2017 [Member]
Principal Amount	$ 15,000,000
Market Value	$ 14,917,875
% of Capital	3.12%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.83%, 2/01/2018 [Member]
Principal Amount	$ 10,000,000
Market Value	$ 9,950,729
% of Capital	2.08%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 1.00%, 3/01/2018 [Member]
Principal Amount	$ 5,000,000
Market Value	$ 4,966,419
% of Capital	1.04%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 1.01%, 3/29/2018 [Member]
Principal Amount	$ 10,000,000
Market Value	$ 9,924,459
% of Capital	2.07%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 1.07%, 4/26/2018 [Member]
Principal Amount	$ 20,000,000
Market Value	$ 19,824,130
% of Capital	4.14%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 1.15%, 5/24/2018 [Member]
Principal Amount	$ 10,000,000
Market Value	$ 9,896,450
% of Capital	2.07%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 1.20%, 6/21/2018 [Member]
Principal Amount	$ 10,000,000
Market Value	$ 9,883,146
% of Capital	2.06%
United States Copper Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member]
Number of Contracts \| Contract	193	[4]
Unrealized Gain (Loss) on Open Commodity Contracts	$ 385,713	[4]
% of Capital	2.94%	[4]
United States Copper Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| COMEX Copper Futures HG September 2017 contracts, expiring September 2017 [Member]
Number of Contracts \| Contract	97
Unrealized Gain (Loss) on Open Commodity Contracts	$ 293,275
% of Capital	2.23%
United States Copper Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| COMEX Copper Futures HG December 2017 contracts, expiring December 2017 [Member]
Number of Contracts \| Contract	96
Unrealized Gain (Loss) on Open Commodity Contracts	$ 92,438
% of Capital	0.71%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member]
Market Value	$ 9,823,192
% of Capital	74.82%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.62%, 7/06/2017 [Member]
Principal Amount	$ 250,000
Market Value	$ 249,979
% of Capital	1.90%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.59%, 7/13/2017 [Member]
Principal Amount	$ 500,000
Market Value	$ 499,902
% of Capital	3.81%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.61%, 7/20/2017 [Member]
Principal Amount	$ 250,000
Market Value	$ 249,920
% of Capital	1.90%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.60%, 7/27/2017 [Member]
Principal Amount	$ 500,000
Market Value	$ 499,785
% of Capital	3.81%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.63%, 8/03/2017 [Member]
Principal Amount	$ 250,000
Market Value	$ 249,857
% of Capital	1.90%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.61%, 8/10/2017 [Member]
Principal Amount	$ 200,000
Market Value	$ 199,864
% of Capital	1.52%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.65%, 8/17/2017 [Member]
Principal Amount	$ 250,000
Market Value	$ 249,788
% of Capital	1.90%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.67%, 8/24/2017 [Member]
Principal Amount	$ 300,000
Market Value	$ 299,698
% of Capital	2.28%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.76%, 8/31/2017 [Member]
Principal Amount	$ 300,000
Market Value	$ 299,616
% of Capital	2.28%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S .Treasury Bills 0.84%, 9/07/2017 [Member]
Principal Amount	$ 750,000
Market Value	$ 748,810
% of Capital	5.70%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.86%, 9/14/2017 [Member]
Principal Amount	$ 750,000
Market Value	$ 748,656
% of Capital	5.70%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.87%, 9/21/2017 [Member]
Principal Amount	$ 750,000
Market Value	$ 748,514
% of Capital	5.70%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.89%, 9/28/2017 [Member]
Principal Amount	$ 500,000
Market Value	$ 498,900
% of Capital	3.80%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.90%, 10/05/2017 [Member]
Principal Amount	$ 750,000
Market Value	$ 748,210
% of Capital	5.70%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.92%, 10/12/2017 [Member]
Principal Amount	$ 300,000
Market Value	$ 299,215
% of Capital	2.28%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.91%, 10/19/2017 [Member]
Principal Amount	$ 400,000
Market Value	$ 398,894
% of Capital	3.04%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S .Treasury Bills 0.95%, 10/26/2017 [Member]
Principal Amount	$ 250,000
Market Value	$ 249,228
% of Capital	1.90%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.97%, 11/02/2017 [Member]
Principal Amount	$ 200,000
Market Value	$ 199,335
% of Capital	1.52%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.98%, 11/16/2017 [Member]
Principal Amount	$ 200,000
Market Value	$ 199,249
% of Capital	1.52%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 1.05%, 11/24/2017 [Member]
Principal Amount	$ 300,000
Market Value	$ 298,729
% of Capital	2.28%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 1.09%, 12/14/2017 [Member]
Principal Amount	$ 100,000
Market Value	$ 99,502
% of Capital	0.76%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 1.11%, 12/21/2017 [Member]
Principal Amount	$ 200,000
Market Value	$ 198,943
% of Capital	1.52%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.92%, 1/04/2018 [Member]
Principal Amount	$ 250,000
Market Value	$ 248,818
% of Capital	1.90%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.82%, 2/01/2018 [Member]
Principal Amount	$ 200,000
Market Value	$ 199,030
% of Capital	1.52%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 1.02%, 3/01/2018 [Member]
Principal Amount	$ 500,000
Market Value	$ 496,600
% of Capital	3.78%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 1.02%, 3/29/2018 [Member]
Principal Amount	$ 250,000
Market Value	$ 248,099
% of Capital	1.89%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 1.06%, 4/26/2018 [Member]
Principal Amount	$ 200,000
Market Value	$ 198,264
% of Capital	1.51%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 1.17%, 5/24/2018 [Member]
Principal Amount	$ 100,000
Market Value	$ 98,951
% of Capital	0.75%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 1.19%, 6/21/2018 [Member]
Principal Amount	$ 100,000
Market Value	$ 98,836
% of Capital	0.75%
United States Agriculture Index Fund [Member]
Number of Contracts \| Contract	74	[5]
Unrealized Gain (Loss) on Open Commodity Contracts	$ 2,178	[5]
% of Capital	0.12%	[5]
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member]
Number of Contracts \| Contract	33
Unrealized Gain (Loss) on Open Commodity Contracts	$ (34,779)
% of Capital	(1.86%)
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-US Cocoa Futures CC September 2017 contracts, expiring September 2017 [Member]
Number of Contracts \| Contract	4
Unrealized Gain (Loss) on Open Commodity Contracts	$ (6,390)
% of Capital	(0.34%)
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-US Sugar #11 Futures SB October 2017 contracts, expiring September 2017 [Member]
Number of Contracts \| Contract	10
Unrealized Gain (Loss) on Open Commodity Contracts	$ (13,485)
% of Capital	(0.72%)
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-Canola Futures RS November 2017 contracts, expiring November 2017 [Member]
Number of Contracts \| Contract	12
Unrealized Gain (Loss) on Open Commodity Contracts	$ 2,203
% of Capital	0.12%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-US Cotton #2 Futures CT December 2017 contracts, expiring December 2017 [Member]
Number of Contracts \| Contract	4
Unrealized Gain (Loss) on Open Commodity Contracts	$ (8,595)
% of Capital	(0.46%)
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-US Coffee-C Futures KC December 2017 contracts, expiring December 2017 [Member]
Number of Contracts \| Contract	3
Unrealized Gain (Loss) on Open Commodity Contracts	$ (8,512)
% of Capital	(0.46%)
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member]
Number of Contracts \| Contract	41
Unrealized Gain (Loss) on Open Commodity Contracts	$ 36,957
% of Capital	1.98%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Lean Hogs Futures LH August 2017 contracts, expiring August 2017 [Member]
Number of Contracts \| Contract	5
Unrealized Gain (Loss) on Open Commodity Contracts	$ 9,570
% of Capital	0.51%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Wheat Futures W September 2017 contracts, expiring September 2017 [Member]
Number of Contracts \| Contract	5
Unrealized Gain (Loss) on Open Commodity Contracts	$ 16,350
% of Capital	0.88%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Feeder Cattle Futures FC September 2017 contracts, expiring September 2017 [Member]
Number of Contracts \| Contract	1
Unrealized Gain (Loss) on Open Commodity Contracts	$ 650
% of Capital	0.03%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Soybean Oil Futures BO October 2017 contracts, expiring October 2017 [Member]
Number of Contracts \| Contract	5
Unrealized Gain (Loss) on Open Commodity Contracts	$ 3,570
% of Capital	0.19%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Live Cattle Futures LC October 2017 contracts, expiring October 2017 [Member]
Number of Contracts \| Contract	5
Unrealized Gain (Loss) on Open Commodity Contracts	$ (3,300)
% of Capital	(0.18%)
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Soybean Futures S November 2017 contracts, expiring November 2017 [Member]
Number of Contracts \| Contract	4
Unrealized Gain (Loss) on Open Commodity Contracts	$ (5,488)
% of Capital	(0.29%)
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Corn Futures C December 2017 contracts, expiring December 2017 [Member]
Number of Contracts \| Contract	10
Unrealized Gain (Loss) on Open Commodity Contracts	$ 3,287
% of Capital	0.18%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| KCBT Hard Red Winter Wheat Futures KW December 2017 contracts, expiring December 2017 [Member]
Number of Contracts \| Contract	4
Unrealized Gain (Loss) on Open Commodity Contracts	$ 10,088
% of Capital	0.54%
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Soybean Meal Futures SM January 2018 contracts, expiring January 2018 [Member]
Number of Contracts \| Contract	2
Unrealized Gain (Loss) on Open Commodity Contracts	$ 2,230
% of Capital	0.12%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member]
Market Value	$ 1,197,553
% of Capital	64.07%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.62%, 7/06/2017 [Member]
Principal Amount	$ 250,000
Market Value	$ 249,979
% of Capital	13.37%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S .Treasury Bills 0.85%, 8/03/2017 [Member]
Principal Amount	$ 100,000
Market Value	$ 99,922
% of Capital	5.35%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.65%, 8/17/2017 [Member]
Principal Amount	$ 250,000
Market Value	$ 249,788
% of Capital	13.36%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S .Treasury Bills 0.98%, 9/21/2017 [Member]
Principal Amount	$ 100,000
Market Value	$ 99,777
% of Capital	5.34%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S .Treasury Bills 0.95%, 10/05/2017 [Member]
Principal Amount	$ 100,000
Market Value	$ 99,748
% of Capital	5.34%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.97%, 11/02/2017 [Member]
Principal Amount	$ 100,000
Market Value	$ 99,668
% of Capital	5.33%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 0.98%, 11/16/2017 [Member]
Principal Amount	$ 100,000
Market Value	$ 99,624
% of Capital	5.33%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 1.05%, 11/24/2017 [Member]
Principal Amount	$ 100,000
Market Value	$ 99,576
% of Capital	5.33%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| US Treasury Securities [Member] \| U.S. Treasury Bills 1.11%, 12/21/2017 [Member]
Principal Amount	$ 100,000
Market Value	$ 99,471
% of Capital	5.32%

[1]	Collateral amounted to $56,851,214 on open futures contracts.
[2]	Represents less than 0.005%.
[3]	All short contracts are offset by the same number of Futures Contracts in the corresponding long positions and are acquired solely for the purpose of reducing a long position (e.g., due to a redemption or to reflect a rebalancing of the SDCI).
[4]	Collateral amounted to $775,887 on open futures contracts.
[5]	Collateral amounted to $195,861 on open futures contracts.

Condensed Schedule of Investme4

Condensed Schedule of Investments (Parenthetical)	6 Months Ended
Condensed Schedule of Investments (Parenthetical)	Jun. 30, 2017USD ($)
United States Commodity Index Fund [Member]
Debt Instrument, Collateral Amount	$ 56,851,214
Interest rate	0.005%
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| Lme Nickel Futures Ln July 2017 Contracts, Expiring July 2017 [Member]
Expiration date	July 2,017
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| LME Lead Futures LL September 2017 contracts, expiring September 2017 [Member]
Expiration date	September 2,017
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| LME Tin Futures LT September 2017 contracts, expiring September 2017 [Member]
Expiration date	September 2,017
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| LME Tin Futures LT November 2017 contracts, expiring November 2017 [Member]
Expiration date	November 2,017
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| LME Zinc Futures LX November 2017 contracts, expiring November 2017 [Member]
Expiration date	November 2,017
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-US Cotton #2 Futures CT December 2017 contracts, expiring December 2017 [Member]
Expiration date	December 2,017
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| LME Aluminum Futures LA February 2018 contracts, expiring February 2018 [Member]
Expiration date	February 2,018
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| LME Nickel Futures LN August 2017 contracts, expiring August 2017 [Member]
Expiration date	August 2,017
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| COMEX Copper Futures HG December 2017 contracts, expiring December 2017 [Member]
Expiration date	December 2,017
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| NYMEX Natural Gas Futures NG February 2018 contracts, expiring January 2018 [Member]
Expiration date	January 2,018
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| NYMEX RBOB Gasoline Futures RB October 2017 contracts, expiring September 2017 [Member]
Expiration date	September 2,017
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Lean Hogs Futures LH October 2017 contracts, expiring October 2017 [Member]
Expiration date	October 2,017
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| COMEX Gold Futures GC October 2017 contracts, expiring October 2017 [Member]
Expiration date	October 2,017
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Live Cattle Futures LC October 2017 contracts, expiring October 2017 [Member]
Expiration date	October 2,017
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Soybean Oil Futures BO December 2017 contracts, expiring December 2017 [Member]
Expiration date	December 2,017
United States Commodity Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Feeder Cattle Futures FC January 2018 contracts, expiring January 2018 [Member]
Expiration date	January 2,018
United States Commodity Index Fund [Member] \| Open Futures Contracts Short [Member] \| Foreign [Member] \| Lme Nickel Futures Ln July 2017 Contracts, Expiring July 2017 [Member]
Expiration date	July 2,017
United States Commodity Index Fund [Member] \| Open Futures Contracts Short [Member] \| Foreign [Member] \| LME Lead Futures LL September 2017 contracts, expiring September 2017 [Member]
Expiration date	September 2,017
United States Commodity Index Fund [Member] \| Open Futures Contracts Short [Member] \| Foreign [Member] \| LME Tin Futures LT September 2017 contracts, expiring September 2017 [Member]
Expiration date	September 2,017
United States Commodity Index Fund [Member] \| Open Futures Contracts Short [Member] \| Foreign [Member] \| LME Tin Futures LT November 2017 contracts, expiring November 2017 [Member]
Expiration date	November 2,017
United States Commodity Index Fund [Member] \| Open Futures Contracts Short [Member] \| Foreign [Member] \| LME Zinc Futures LX November 2017 contracts, expiring November 2017 [Member]
Expiration date	November 2,017
United States Commodity Index Fund [Member] \| Open Futures Contracts Short [Member] \| Foreign [Member] \| LME Aluminum Futures LA February 2018 contracts, expiring February 2018 [Member]
Expiration date	February 2,018
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 0.62%, 7/06/2017 [Member]
Expiration date	7/06/2017
Interest rate	0.62%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 0.60%, 7/27/2017 [Member]
Expiration date	7/27/2017
Interest rate	0.60%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 0.88%, 8/03/2017 [Member]
Expiration date	8/03/2017
Interest rate	0.88%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 0.65%, 8/17/2017 [Member]
Expiration date	8/17/2017
Interest rate	0.65%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 0.76%, 8/31/2017 [Member]
Expiration date	8/31/2017
Interest rate	0.76%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 0.84%, 9/07/2017 [Member]
Expiration date	9/07/2017
Interest rate	0.84%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 0.89%, 9/21/2017 [Member]
Expiration date	9/21/2017
Interest rate	0.89%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 0.89%, 9/28/2017 [Member]
Expiration date	9/28/2017
Interest rate	0.89%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 0.96%, 10/05/2017 [Member]
Expiration date	10/05/2017
Interest rate	0.96%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 0.92%, 10/12/2017 [Member]
Expiration date	10/12/2017
Interest rate	0.92%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 0.91%, 10/19/2017 [Member]
Expiration date	10/19/2017
Interest rate	0.91%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 0.95%, 10/26/2017 [Member]
Expiration date	10/26/2017
Interest rate	0.95%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 0.97%, 11/02/2017 [Member]
Expiration date	11/02/2017
Interest rate	0.97%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 1.01%, 11/09/2017[Member]
Expiration date	11/09/2017
Interest rate	1.01%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 0.98%, 11/16/2017 [Member]
Expiration date	11/16/2017
Interest rate	0.98%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 1.05%, 11/24/2017 [Member]
Expiration date	11/24/2017
Interest rate	1.05%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 1.08%, 12/07/2017 [Member]
Expiration date	12/07/2017
Interest rate	1.08%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 1.09%, 12/14/2017 [Member]
Expiration date	12/14/2017
Interest rate	1.09%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 1.11%, 12/21/2017 [Member]
Expiration date	12/21/2017
Interest rate	1.11%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 1.10%, 12/28/2017 [Member]
Expiration date	12/28/2017
Interest rate	1.10%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 0.83%, 2/01/2018 [Member]
Expiration date	2/01/2018
Interest rate	0.83%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 1.00%, 3/01/2018 [Member]
Expiration date	3/01/2018
Interest rate	1.00%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 1.01%, 3/29/2018 [Member]
Expiration date	3/29/2018
Interest rate	1.01%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 1.07%, 4/26/2018 [Member]
Expiration date	4/26/2018
Interest rate	1.07%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 1.15%, 5/24/2018 [Member]
Expiration date	5/24/2018
Interest rate	1.15%
United States Commodity Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 1.20%, 6/21/2018 [Member]
Expiration date	6/21/2018
Interest rate	1.20%
United States Copper Index Fund [Member]
Debt Instrument, Collateral Amount	$ 775,887
United States Copper Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| COMEX Copper Futures HG September 2017 contracts, expiring September 2017 [Member]
Expiration date	September 2,017
United States Copper Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| COMEX Copper Futures HG December 2017 contracts, expiring December 2017 [Member]
Expiration date	December 2,017
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.62%, 7/06/2017 [Member]
Expiration date	7/06/2017
Interest rate	0.62%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.59%, 7/13/2017 [Member]
Expiration date	7/13/2017
Interest rate	0.59%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.61%, 7/20/2017 [Member]
Expiration date	7/20/2017
Interest rate	0.61%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.60%, 7/27/2017 [Member]
Expiration date	7/27/2017
Interest rate	0.60%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.63%, 8/03/2017 [Member]
Expiration date	8/03/2017
Interest rate	0.63%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.61%, 8/10/2017 [Member]
Expiration date	8/10/2017
Interest rate	0.61%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.65%, 8/17/2017 [Member]
Expiration date	8/17/2017
Interest rate	0.65%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.67%, 8/24/2017 [Member]
Expiration date	8/24/2017
Interest rate	0.67%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.76%, 8/31/2017 [Member]
Expiration date	8/31/2017
Interest rate	0.76%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.84%, 9/07/2017 [Member]
Expiration date	9/07/2017
Interest rate	0.84%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.86%, 9/14/2017 [Member]
Expiration date	9/14/2017
Interest rate	0.86%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.87%, 9/21/2017 [Member]
Expiration date	9/21/2017
Interest rate	0.87%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.89%, 9/28/2017 [Member]
Expiration date	9/28/2017
Interest rate	0.89%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.90%, 10/05/2017 [Member]
Expiration date	10/05/2017
Interest rate	0.90%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.92%, 10/12/2017 [Member]
Expiration date	10/12/2017
Interest rate	0.92%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.91%, 10/19/2017 [Member]
Expiration date	10/19/2017
Interest rate	0.91%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.95%, 10/26/2017 [Member]
Expiration date	10/26/2017
Interest rate	0.95%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.97%,11/02/2017 [Member]
Expiration date	11/02/2017
Interest rate	0.97%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.98%, 11/16/2017 [Member]
Expiration date	11/16/2017
Interest rate	0.98%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 1.05%, 11/24/2017 [Member]
Expiration date	11/24/2017
Interest rate	1.05%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 1.09%, 12/14/2017 [Member]
Expiration date	12/14/2017
Interest rate	1.09%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 1.11%, 12/21/2017 [Member]
Expiration date	12/21/2017
Interest rate	1.11%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.92%, 1/04/2018 [Member]
Expiration date	1/04/2018
Interest rate	0.92%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.82%, 2/01/2018 [Member]
Expiration date	2/01/2018
Interest rate	0.82%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 1.02%, 3/01/2018 [Member]
Expiration date	3/01/2018
Interest rate	1.02%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 1.02%, 3/29/2018 [Member]
Expiration date	3/29/2018
Interest rate	1.02%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 1.06%, 4/26/2018 [Member]
Expiration date	4/26/2018
Interest rate	1.06%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 1.17%, 5/24/2018 [Member]
Expiration date	5/24/2018
Interest rate	1.17%
United States Copper Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 1.19%, 6/21/2018 [Member]
Expiration date	6/21/2018
Interest rate	1.19%
United States Agriculture Index Fund [Member]
Debt Instrument, Collateral Amount	$ 195,861
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-US Cocoa Futures CC September 2017 contracts, expiring September 2017 [Member]
Expiration date	September 2,017
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-US Sugar #11 Futures SB October 2017 contracts, expiring September 2017 [Member]
Expiration date	September 2,017
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-Canola Futures RS November 2017 contracts, expiring November 2017 [Member]
Expiration date	November 2,017
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-US Cotton 2 Futures CT December 2017 contracts, expiring December 2017 [Member]
Expiration date	December 2,017
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| Foreign [Member] \| ICE-US Coffee-C Futures KC December 2017 contracts, expiring December 2017 [Member]
Expiration date	December 2,017
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Lean Hogs Futures LH August 2017 contracts, expiring August 2017 [Member]
Expiration date	August 2,017
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Wheat Futures W September 2017 contracts, expiring September 2017 [Member]
Expiration date	September 2,017
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Feeder Cattle Futures FC September 2017 contracts, expiring September 2017 [Member]
Expiration date	September 2,017
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Soybean Oil Futures BO October 2017 contracts, expiring October 2017 [Member]
Expiration date	October 2,017
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CME Live Cattle Futures LC October 2017 contracts, expiring October 2017 [Member]
Expiration date	October 2,017
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Soybean Futures S November 2017 contracts, expiring November 2017 [Member]
Expiration date	November 2,017
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Corn Futures C December 2017 contracts, expiring December 2017 [Member]
Expiration date	December 2,017
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| KCBT Hard Red Winter Wheat Futures KW December 2017 contracts, expiring December 2017 [Member]
Expiration date	December 2,017
United States Agriculture Index Fund [Member] \| Open Futures Contracts Long [Member] \| United States Contracts [Member] \| CBOT Soybean Meal Futures SM January 2018 contracts, expiring January 2018 [Member]
Expiration date	January 2,018
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 0.62%, 7/06/2017 [Member]
Expiration date	7/06/2017
Interest rate	0.62%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 0.65%, 8/17/2017 [Member]
Expiration date	8/17/2017
Interest rate	0.65%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 0.97%, 11/02/2017 [Member]
Expiration date	11/02/2017
Interest rate	0.97%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 0.98%, 11/16/2017 [Member]
Expiration date	11/16/2017
Interest rate	0.98%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 1.05%, 11/24/2017 [Member]
Expiration date	11/24/2017
Interest rate	1.05%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S. Treasury Bills 1.11%, 12/21/2017 [Member]
Expiration date	12/21/2017
Interest rate	1.11%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.85%, 08/03/2017 [Member]
Expiration date	8/03/2017
Interest rate	0.85%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.98%, 9/21/2017 [Member]
Expiration date	9/21/2017
Interest rate	0.98%
United States Agriculture Index Fund [Member] \| Cash Equivalents [Member] \| United States Treasury Obligations [Member] \| U.S .Treasury Bills 0.95%, 10/05/2017 [Member]
Expiration date	10/05/2017
Interest rate	0.95%

Condensed Statements of Operati

Condensed Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
Condensed Statements of Operations - USD ($)	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Gain (loss) on trading of commodity futures contracts:
Realized gain (loss) on closed positions	$ 3,478,716	$ 30,280,764	$ (6,218,064)	$ 14,856,609
Change in unrealized gain (loss) on open positions	(14,005,220)	6,500,981	(14,016,783)	20,853,455
Realized gain (loss) on foreign currency transactions	(167)	0	(209)	(15)
Change in unrealized gain (loss) on foreign currency translations	458	6	639	876
Interest income	902,193	458,957	1,620,596	799,436
ETF transaction fees	5,600	6,300	11,550	9,100
Total income (loss)	(9,618,420)	37,247,008	(18,602,271)	36,519,461
Expenses
Management fees (Note 4)	1,064,896	1,123,112	2,211,980	2,128,809
Professional fees	230,192	173,821	353,806	355,053
Brokerage commissions	154,191	183,853	356,524	361,817
Directors' fees and insurance	17,699	14,377	35,200	37,599
Total expenses	1,466,978	1,495,163	2,957,510	2,883,278
Expense waiver (Note 4)	(11,286)	(34,311)	(47,640)	(65,591)
Net expenses	1,455,692	1,460,852	2,909,870	2,817,687
Net income (loss)	(11,074,112)	35,786,156	(21,512,141)	33,701,774
United States Commodity Index Fund [Member]
Gain (loss) on trading of commodity futures contracts:
Realized gain (loss) on closed positions	3,892,126	30,228,101	(6,268,334)	15,028,812
Change in unrealized gain (loss) on open positions	(14,491,916)	6,381,712	(14,405,799)	20,509,156
Interest income	875,584	455,142	1,579,873	793,125
ETF transaction fees	5,250	6,300	9,450	8,750
Total income (loss)	(9,718,956)	37,071,255	(19,084,810)	36,339,843
Expenses
Management fees (Note 4)	1,039,615	1,115,215	2,168,520	2,114,266
Professional fees	215,810	138,443	301,920	288,404
Brokerage commissions	152,400	183,218	352,006	359,905
Directors' fees and insurance	16,810	14,143	33,919	37,195
Total expenses	1,424,635	1,451,019	2,856,365	2,799,770
Net income (loss)	$ (11,143,591)	$ 35,620,236	$ (21,941,175)	$ 33,540,073
Net income (loss) per share (in dollars per share)	$ (0.75)	$ 2.66	$ (1.56)	$ 2.55
Net income (loss) per weighted average share (in dollars per share)	$ (0.82)	$ 2.66	$ (1.58)	$ 2.58
Weighted average shares outstanding (in shares)	13,546,703	13,407,692	13,924,586	13,011,813
United States Copper Index Fund [Member]
Gain (loss) on trading of commodity futures contracts:
Realized gain (loss) on closed positions	$ (339,575)	$ 2,826	$ 171,775	$ (246,050)
Change in unrealized gain (loss) on open positions	429,788	(1,375)	297,138	260,863
Interest income	23,864	2,201	35,660	3,466
ETF transaction fees	350	0	2,100	350
Total income (loss)	114,427	3,652	506,673	18,629
Expenses
Management fees (Note 4)	22,257	4,568	37,308	8,080
Professional fees	10,545	18,502	29,297	34,779
Brokerage commissions	1,344	215	3,580	896
Directors' fees and insurance	554	130	820	222
Total expenses	34,700	23,415	71,005	43,977
Expense waiver (Note 4)	(7,307)	(17,699)	(25,086)	(34,033)
Net expenses	27,393	5,716	45,919	9,944
Net income (loss)	$ 87,034	$ (2,064)	$ 460,754	$ 8,685
Net income (loss) per share (in dollars per share)	$ 0.19	$ (0.01)	$ 1.14	$ 0.28
Net income (loss) per weighted average share (in dollars per share)	$ 0.11	$ (0.01)	$ 0.68	$ 0.05
Weighted average shares outstanding (in shares)	818,132	200,000	680,663	177,198
United States Agriculture Index Fund [Member]
Gain (loss) on trading of commodity futures contracts:
Realized gain (loss) on closed positions	$ (73,835)	$ 49,837	$ (121,505)	$ 73,847
Change in unrealized gain (loss) on open positions	56,908	120,644	91,878	83,436
Realized gain (loss) on foreign currency transactions	(167)	0	(209)	(15)
Change in unrealized gain (loss) on foreign currency translations	458	6	639	876
Interest income	2,745	1,614	5,063	2,845
Total income (loss)	(13,891)	172,101	(24,134)	160,989
Expenses
Management fees (Note 4)	3,024	3,329	6,152	6,463
Professional fees	3,837	16,876	22,589	31,870
Brokerage commissions	447	420	938	1,016
Directors' fees and insurance	335	104	461	182
Total expenses	7,643	20,729	30,140	39,531
Expense waiver (Note 4)	(3,979)	(16,612)	(22,554)	(31,558)
Net expenses	3,664	4,117	7,586	7,973
Net income (loss)	$ (17,555)	$ 167,984	$ (31,720)	$ 153,016
Net income (loss) per share (in dollars per share)	$ (0.18)	$ 1.68	$ (0.32)	$ 1.53
Net income (loss) per weighted average share (in dollars per share)	$ (0.18)	$ 1.68	$ (0.32)	$ 1.53
Weighted average shares outstanding (in shares)	100,000	100,000	100,000	100,000

Condensed Statement of Changes

Condensed Statement of Changes in Capital - USD ($)	3 Months Ended	6 Months Ended
Condensed Statement of Changes in Capital - USD ($)	Jun. 30, 2017	Jun. 30, 2017
Balances, Beginning		$ 643,918,233
Net income (loss)	$ (11,074,112)	(21,512,141)
Balances, Ending	493,785,100	493,785,100
United States Commodity Index Fund [Member]
Balances, Beginning		636,292,824
Additions		31,341,785
Redemptions		(166,906,053)
Net income (loss)	(11,143,591)	(21,941,175)
Balances, Ending	$ 478,787,381	$ 478,787,381
Shares Outstanding, Beginning		15,900,000
Additions		800,000
Redemptions		(4,250,000)
Shares Outstanding, Ending	12,450,000	12,450,000
Net Asset Value Per Share:
Net asset value, beginning of period (in dollars per share)		$ 40.02
Net asset value, end of period (in dollars per share)	$ 38.46	$ 38.46
United States Copper Index Fund [Member]
Balances, Beginning		$ 5,724,654
Additions		8,617,733
Redemptions		(1,674,457)
Net income (loss)	$ 87,034	460,754
Balances, Ending	$ 13,128,684	$ 13,128,684
Shares Outstanding, Beginning		350,000
Additions		500,000
Redemptions		(100,000)
Shares Outstanding, Ending	750,000	750,000
Net Asset Value Per Share:
Net asset value, beginning of period (in dollars per share)		$ 16.36
Net asset value, end of period (in dollars per share)	$ 17.5	$ 17.5
United States Agriculture Index Fund [Member]
Balances, Beginning		$ 1,900,755
Net income (loss)	$ (17,555)	(31,720)
Balances, Ending	$ 1,869,035	$ 1,869,035
Shares Outstanding, Beginning		100,000
Additions		0
Redemptions		0
Shares Outstanding, Ending	100,000	100,000
Net Asset Value Per Share:
Net asset value, beginning of period (in dollars per share)		$ 19.01
Net asset value, end of period (in dollars per share)	$ 18.69	$ 18.69
United States Commodity Index Funds Trust [Member]
Balances, Beginning		$ 643,918,233
Additions		39,959,518
Redemptions		(168,580,510)
Net income (loss)		(21,512,141)
Balances, Ending	$ 493,785,100	$ 493,785,100
Shares Outstanding, Beginning		16,350,000
Additions		1,300,000
Redemptions		(4,350,000)
Shares Outstanding, Ending	13,300,000	13,300,000
Sponsor [Member] \| United States Commodity Index Fund [Member]
Balances, Beginning		$ 0
Additions		0
Redemptions		0
Net income (loss)		0
Balances, Ending	$ 0	$ 0
Shares Outstanding, Beginning		0
Additions		0
Redemptions		0
Shares Outstanding, Ending	0	0
Sponsor [Member] \| United States Copper Index Fund [Member]
Balances, Beginning		$ 0
Additions		0
Redemptions		0
Net income (loss)		0
Balances, Ending	$ 0	$ 0
Shares Outstanding, Beginning		0
Additions		0
Redemptions		0
Shares Outstanding, Ending	0	0
Sponsor [Member] \| United States Agriculture Index Fund [Member]
Balances, Beginning		$ 0
Net income (loss)		0
Balances, Ending	$ 0	$ 0
Shares Outstanding, Beginning		0
Additions		0
Redemptions		0
Shares Outstanding, Ending	0	0
Sponsor [Member] \| United States Commodity Index Funds Trust [Member]
Balances, Beginning		$ 0
Additions		0
Redemptions		0
Net income (loss)		0
Balances, Ending	$ 0	$ 0
Shares Outstanding, Beginning		0
Additions		0
Redemptions		0
Shares Outstanding, Ending	0	0
Shareholders [Member] \| United States Commodity Index Fund [Member]
Balances, Beginning		$ 636,292,824
Additions		31,341,785
Redemptions		(166,906,053)
Net income (loss)		(21,941,175)
Balances, Ending	$ 478,787,381	$ 478,787,381
Shares Outstanding, Beginning		15,900,000
Additions		800,000
Redemptions		(4,250,000)
Shares Outstanding, Ending	12,450,000	12,450,000
Shareholders [Member] \| United States Copper Index Fund [Member]
Balances, Beginning		$ 5,724,654
Additions		8,617,733
Redemptions		(1,674,457)
Net income (loss)		460,754
Balances, Ending	$ 13,128,684	$ 13,128,684
Shares Outstanding, Beginning		350,000
Additions		500,000
Redemptions		(100,000)
Shares Outstanding, Ending	750,000	750,000
Shareholders [Member] \| United States Agriculture Index Fund [Member]
Balances, Beginning		$ 1,900,755
Net income (loss)		(31,720)
Balances, Ending	$ 1,869,035	$ 1,869,035
Shares Outstanding, Beginning		100,000
Additions		0
Redemptions		0
Shares Outstanding, Ending	100,000	100,000
Shareholders [Member] \| United States Commodity Index Funds Trust [Member]
Balances, Beginning		$ 643,918,233
Additions		39,959,518
Redemptions		(168,580,510)
Net income (loss)		(21,512,141)
Balances, Ending	$ 493,785,100	$ 493,785,100
Shares Outstanding, Beginning		16,350,000
Additions		1,300,000
Redemptions		(4,350,000)
Shares Outstanding, Ending	13,300,000	13,300,000

Condensed Statements of Cash Fl

Condensed Statements of Cash Flows - USD ($)	6 Months Ended
Condensed Statements of Cash Flows - USD ($)	Jun. 30, 2017	Jun. 30, 2016
Cash Flows from Operating Activities:
Net income (loss)	$ (21,512,141)	$ 33,701,774
Cash Flows from Financing Activities:
Cash and Cash Equivalents, beginning of period	608,435,196
Cash and Cash Equivalents, end of period	448,559,116
United States Commodity Index Fund [Member]
Cash Flows from Operating Activities:
Net income (loss)	(21,941,175)	33,540,073
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
(Increase) decrease in commodity futures trading account - cash and cash equivalents	(16,800,694)	17,372,110
Unrealized (gain) loss on open futures contracts	14,405,799	(20,509,156)
(Increase) decrease in interest receivable	1,261	0
(Increase) decrease in directors' fees and insurance receivable	(9,990)	(4,479)
(Increase) decrease in ETF transaction fees receivable	350	0
Increase (decrease) in management fees payable	(128,131)	40,713
Increase (decrease) in professional fees payable	(289,180)	(367,651)
Increase (decrease) in brokerage commissions payable	(10,710)	0
Increase (decrease) in directors' fees and insurance payable	(6,164)	0
Net cash provided by (used in) operating activities	(24,778,634)	30,071,610
Cash Flows from Financing Activities:
Addition of shares	31,341,785	126,570,004
Redemption of shares	(172,921,436)	(19,655,279)
Net cash provided by (used in) financing activities	(141,579,651)	106,914,725
Net Increase (Decrease) in Cash and Cash Equivalents	(166,358,285)	136,986,335
Cash and Cash Equivalents, beginning of period	601,266,026	474,315,271
Cash and Cash Equivalents, end of period	434,907,741	611,301,606
United States Copper Index Fund [Member]
Cash Flows from Operating Activities:
Net income (loss)	460,754	8,685
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
(Increase) decrease in commodity futures trading account - cash and cash equivalents	(522,722)	166,355
Unrealized (gain) loss on open futures contracts	(297,138)	(260,863)
(Increase) decrease in receivable from Sponsor	50,554	25,570
(Increase) decrease in directors' fees and insurance receivable	(574)	2
Increase (decrease) in management fees payable	3,751	319
Increase (decrease) in professional fees payable	(46,608)	(12,967)
Increase (decrease) in directors' fees and insurance payable	(47)	0
Net cash provided by (used in) operating activities	(352,030)	(72,899)
Cash Flows from Financing Activities:
Addition of shares	8,617,733	760,489
Redemption of shares	(1,674,457)	0
Net cash provided by (used in) financing activities	6,943,276	760,489
Net Increase (Decrease) in Cash and Cash Equivalents	6,591,246	687,590
Cash and Cash Equivalents, beginning of period	5,387,655	1,871,256
Cash and Cash Equivalents, end of period	11,978,901	2,558,846
United States Agricultural Index Fund [Member]
Cash Flows from Operating Activities:
Net income (loss)	(31,720)	153,016
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
(Increase) decrease in commodity futures trading account - cash and cash equivalents	12,445	60,202
Unrealized (gain) loss on open futures contracts	(91,878)	(83,436)
(Increase) decrease in receivable from Sponsor	49,619	24,766
(Increase) decrease in interest receivable	(793)	(39)
Increase (decrease) in management fees payable	(71)	54
Increase (decrease) in professional fees payable	(46,628)	(12,298)
Increase (decrease) in directors' fees and insurance payable	(15)	(64)
Net cash provided by (used in) operating activities	(109,041)	142,201
Cash Flows from Financing Activities:
Addition of shares	0	0
Redemption of shares	0	0
Net cash provided by (used in) financing activities	0	0
Net Increase (Decrease) in Cash and Cash Equivalents	(109,041)	142,201
Cash and Cash Equivalents, beginning of period	1,781,515	1,820,742
Cash and Cash Equivalents, end of period	1,672,474	1,962,943
United States Commodity Index Funds Trust [Member]
Cash Flows from Operating Activities:
Net income (loss)	(21,512,141)	33,701,774
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
(Increase) decrease in commodity futures trading account - cash and cash equivalents	(17,310,971)	17,598,667
Unrealized (gain) loss on open futures contracts	14,016,783	(20,853,455)
(Increase) decrease in receivable from Sponsor	100,173	50,336
(Increase) decrease in interest receivable	1,261	0
(Increase) decrease in directors' fees and insurance receivable	(11,357)	(4,516)
(Increase) decrease in ETF transaction fees receivable	350	0
Increase (decrease) in management fees payable	(124,451)	41,086
Increase (decrease) in professional fees payable	(382,416)	(392,916)
Increase (decrease) in brokerage commissions payable	(10,710)	0
Increase (decrease) in directors' fees and insurance payable	(6,226)	(64)
Net cash provided by (used in) operating activities	(25,239,705)	30,140,912
Cash Flows from Financing Activities:
Addition of shares	39,959,518	127,330,493
Redemption of shares	(174,595,893)	(19,655,279)
Net cash provided by (used in) financing activities	(134,636,375)	107,675,214
Net Increase (Decrease) in Cash and Cash Equivalents	(159,876,080)	137,816,126
Cash and Cash Equivalents, beginning of period	608,435,196	478,007,269
Cash and Cash Equivalents, end of period	$ 448,559,116	$ 615,823,395

ORGANIZATION AND BUSINESS

ORGANIZATION AND BUSINESS	6 Months Ended
ORGANIZATION AND BUSINESS	Jun. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization And Business	NOTE 1 - ORGANIZATION AND BUSINESS The United States Commodity Index Funds Trust (the “Trust”) was organized as a Delaware statutory trust on December 21, 2009. The Trust is a series trust formed pursuant to the Delaware Statutory Trust Act and includes the United States Commodity Index Fund (“USCI”), a commodity pool formed on April 1, 2010 and first made available to the public on August 10, 2010, the United States Copper Index Fund (“CPER”), a commodity pool formed on November 26, 2010 and first made available to the public on November 15, 2011, and the United States Agriculture Index Fund (“USAG”), a commodity pool formed on November 26, 2010 and first made available to the public on April 13, 2012. United States Commodity Funds LLC (“USCF”), as the sponsor of the Trust and its series the United States Metals Index Fund (“USMI”), terminated USMI effective March 18, 2015 and USMI was also delisted from NYSE Arca. On March 24, 2015, USMI liquidated all its assets and distributed cash pro rata to all remaining shareholders as of such date. USCI, CPER and USAG each issue shares (“shares”) that may be purchased and sold on the NYSE Arca, Inc. (“NYSE Arca”). USCI, CPER, and USAG are collectively referred to herein as the “Trust Series.” The Trust and each Trust Series operate pursuant to the Third Amended and Restated Declaration of Trust and Trust Agreement dated as of March 22, 2013 (the “Trust Agreement”). USCF is the sponsor of the Trust and the Trust Series and is also responsible for the management of the Trust and the Trust Series. For purposes of the financial statement presentation, unless specified otherwise, all references will be to the Trust Series. USCF has the power and authority to establish and designate one or more series and to issue shares thereof, from time to time as it deems necessary or desirable. USCF has exclusive power to fix and determine the relative rights and preferences as between the shares of any series as to right of redemption, special and relative rights as to dividends and other distributions and on liquidation, conversion rights, and conditions under which the series shall have separate voting rights or no voting rights. The term for which the Trust is to exist commenced on the date of the filing of the Certificate of Trust, and the Trust and any Trust Series will exist in perpetuity, unless earlier terminated in accordance with the provisions of the Trust Agreement. Separate and distinct records must be maintained for each Trust Series and the assets associated with a Trust Series must be held in such separate and distinct records (directly or indirectly, including a nominee or otherwise) and accounted for in such separate and distinct records separately from the assets of any other Trust Series. Each Trust Series is separate from all other Trust Series created as series of the Trust in respect of the assets and liabilities allocated to that Trust Series and represents a separate investment portfolio of the Trust. In connection with the Third Amended and Restated Declaration of Trust, dated March 22, 2013, a new series of the Trust was designated on June 1, 2016, the USCF Canadian Crude Oil Index Fund (“UCCO”). UCCO is currently in registration and has not commenced operations as of the filing of this quarterly report on Form 10-Q. The sole Trustee of the Trust is Wilmington Trust Company (the “Trustee”), a Delaware banking corporation. The Trustee is unaffiliated with USCF. The Trustee’s duties and liabilities with respect to the offering of shares and the management of the Trust are limited to its express obligations under the Trust Agreement. USCF is a member of the National Futures Association (the “NFA”) and became a commodity pool operator (“CPO”) registered with the Commodity Futures Trading Commission (the “CFTC”) effective December 1, 2005. The Trust and each Trust Series have a fiscal year ending on December 31. USCF is also the general partner of the United States Oil Fund, LP (“USO”), the United States Natural Gas Fund, LP (“UNG”), the United States 12 Month Oil Fund, LP (“USL”), the United States Gasoline Fund, LP (“UGA”) and the United States Diesel-Heating Oil Fund, LP (“UHN”), which listed their limited partnership shares on the American Stock Exchange (the “AMEX”) under the ticker symbols “USO” on April 10, 2006, “UNG” on April 18, 2007, “USL” on December 6, 2007, “UGA” on February 26, 2008 and “UHN” on April 9, 2008, respectively. As a result of the acquisition of the AMEX by NYSE Euronext, each of USO’s, UNG’s, USL’s, UGA’s and UHN’s shares commenced trading on the NYSE Arca on November 25, 2008. USCF is also the general partner of the United States Short Oil Fund, LP (“DNO”), the United States 12 Month Natural Gas Fund, LP (“UNL”) and the United States Brent Oil Fund, LP (“BNO”), which listed their limited partnership shares on the NYSE Arca under the ticker symbols “DNO” on September 24, 2009, “UNL” on November 18, 2009 and “BNO” on June 2, 2010, respectively. All funds listed previously, other than UCCO, are referred to collectively herein as the “Related Public Funds.” In addition, USCF is the sponsor of the USCF Funds Trust, a Delaware statutory trust, and each of its series, the REX S&P MLP Fund and the REX S&P MLP Inverse Fund which are currently in registration and have not commenced operations and the United States 3X Oil Fund and the United States 3X Short Oil Fund which were in registration as of June 30, 2017 and commenced operations on July 20, 2017. The funds that are series of the USCF Funds Trust are not included in the Related Public Funds. Effective as of May 1, 2012, each of USCI, CPER and USAG issue shares to certain authorized purchasers (“Authorized Participants”) by offering baskets consisting of 50,000 100,000 Authorized Participants pay USCI a transaction fee of $ 350 50,000 1,000 350 1,000 The accompanying unaudited condensed financial statements have been prepared in accordance with Rule 10-01 of Regulation S-X promulgated by the U.S. Securities and Exchange Commission (the “SEC”) and, therefore, do not include all information and footnote disclosure required under generally accepted accounting principles in the United States of America (“U.S. GAAP”). The financial information included herein is unaudited; however, such financial information reflects all adjustments, consisting only of normal recurring adjustments, which are, in the opinion of USCF, necessary for the fair presentation of the condensed financial statements for the interim period.

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	6 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	Jun. 30, 2017
Accounting Policies [Abstract]
Summary Of Significant Accounting Policies	NOTE 2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation The financial statements have been prepared in conformity with U.S. GAAP as detailed in the Financial Accounting Standards Board’s (“FASB”) Accounting Standards Codification. Each Trust Series is an investment company and follows the accounting and reporting guidance in FASB Topic 946. The Trust financial statements included its respective series of funds financial statements including USCI, CPER, and USAG through March 31, 2015. For reporting commencing with the June 30, 2015 reporting period, and in conjunction with the termination of USMI on March 18, 2015 the USMI financial statements have not been included, but are included in the overall Trust financial statements for the applicable reporting periods. Revenue Recognition Commodity futures contracts, forward contracts, physical commodities, and related options are recorded on the trade date. All such transactions are recorded on the identified cost basis and marked to market daily. Unrealized gains or losses on open contracts are reflected in the condensed statements of financial condition and represent the difference between the original contract amount and the market value (as determined by exchange settlement prices for futures contracts and related options and cash dealer prices at a predetermined time for forward contracts, physical commodities, and their related options) as of the last business day of the year or as of the last date of the condensed financial statements. Changes in the unrealized gains or losses between periods are reflected in the condensed statements of operations. Each Trust Series earns income on funds held at the custodian or futures commission merchant (“FCM”) at prevailing market rates earned on such investments. Brokerage Commissions Brokerage commissions on all open commodity futures contracts are accrued on a full-turn basis. Income Taxes The Trust Series are not subject to federal income taxes; each investor reports his/her allocable share of income, gain, loss deductions or credits on his/her own income tax return. In accordance with U.S. GAAP, each Trust Series is required to determine whether a tax position is more likely than not to be sustained upon examination by the applicable taxing authority, including resolution of any tax related appeals or litigation processes, based on the technical merits of the position. Each Trust Series files an income tax return in the U.S. federal jurisdiction, and may file income tax returns in various U.S. states. None of the Trust Series is subject to income tax return examinations by major taxing authorities for years before 2013. The tax benefit recognized is measured as the largest amount of benefit that has a greater than fifty percent likelihood of being realized upon ultimate settlement. De-recognition of a tax benefit previously recognized results in each Trust Series recording a tax liability that reduces net assets. However, each Trust Series’ conclusions regarding this policy may be subject to review and adjustment at a later date based on factors including, but not limited to, on-going analysis of and changes to tax laws, regulations and interpretations thereof. Each Trust Series recognizes interest accrued related to unrecognized tax benefits and penalties related to unrecognized tax benefits in income tax fees payable, if assessed. No interest expense or penalties have been recognized as of and for the period ended June 30, 2017 for any Trust Series. Trust Capital and Allocation of Income and Losses Profit or loss shall be allocated among the shareholders of each Trust Series in proportion to the number of shares each investor holds as of the close of each month. USCF may revise, alter or otherwise modify this method of allocation as described in the Trust Agreement. Creations and Redemptions Effective as of May 1, 2012, Authorized Participants may purchase Creation Baskets or redeem Redemption Baskets for USCI, CPER and USAG only in blocks of 50,000 shares at a price equal to the NAV of the shares calculated shortly after the close of the core trading session on the NYSE Arca on the day the order is placed. Each Trust Series receives or pays the proceeds from shares sold or redeemed within three business days after the trade date of the purchase or redemption. The amounts due from Authorized Participants are reflected in each Trust Series’ condensed statements of financial condition as receivable for shares sold, and amounts payable to Authorized Participants upon redemption are reflected as payable for shares redeemed. Authorized Participants pay each Trust Series a transaction fee of $350 for each order placed to create one or more Creation Baskets or to redeem one or more Redemption Baskets. Calculation of Per Share NAV Each Trust Series’ per share NAV is calculated on each NYSE Arca trading day by taking the current market value of its total assets, subtracting any liabilities and dividing the amount by the total number of shares issued and outstanding. Each Trust Series uses the closing prices on the relevant Futures Exchanges (as defined in Note 3 below) of the Applicable Benchmark Component Futures Contracts (as defined in Note 3 below) that at any given time make up the Applicable Index (as defined in Note 3 below) (determined at the earlier of the close of such exchange or 2:30 p.m. New York time) for the contracts traded on the Futures Exchanges, but calculates or determines the value of all other investments of each Trust Series using market quotations, if available, or other information customarily used to determine the fair value of such investments. Net Income (Loss) Per Share Net income (loss) per share is the difference between the per share NAV at the beginning of each period and the per share NAV at the end of each period. The weighted average number of shares outstanding was computed for purposes of disclosing net income (loss) per weighted average share. The weighted average shares are equal to the number of shares outstanding at the end of the period, adjusted proportionately for shares added and redeemed based on the amount of time the shares were outstanding during such period. As of June 30, 2017, USCF held 5 shares of USCI, 40 shares of CPER and 5 shares of USAG. Offering Costs Offering costs incurred in connection with the registration of shares prior to the commencement of the offering are borne by USCF. Offering costs incurred in connection with the registration of additional shares after the commencement of the offering are borne by each Trust Series. These costs include registration fees paid to regulatory agencies and all legal, accounting, printing and other expenses associated with such offerings. Costs borne by the Trust Series after the commencement of an offering are accounted for as a deferred charge and thereafter amortized to expense over twelve months on a straight-line basis or a shorter period if warranted. Cash Equivalents Cash equivalents include money market funds and overnight deposits or time deposits with original maturity dates of six months or less. Reclassifications Certain prior year amounts have been reclassified to conform to the current year presentation. Use of Estimates The preparation of condensed financial statements in conformity with U.S. GAAP requires USCF to make estimates and assumptions that affect the reported amount of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed financial statements, and the reported amounts of the revenue and expenses during the reporting period. Actual results may differ from those estimates and assumptions.

TRUST SERIES

TRUST SERIES	6 Months Ended
TRUST SERIES	Jun. 30, 2017
Trust Series [Abstract]
Trust Series	NOTE 3 - TRUST SERIES In connection with the execution of the First Trust Agreement on April 1, 2010, USCI was designated as the first series of the Trust. USCF contributed $ 1,000 1,000 20 On July 30, 2010, USCI received a notice of effectiveness from the U.S. Securities and Exchange Commission (the “SEC”) for its registration of 50,000,000 50.00 100,000 5,000,000 100,000 1,000 20 In connection with the Second Amended and Restated Trust Agreement dated November 10, 2010, USMI, USAG and CPER were designated as three additional series of the Trust. Following the designation of the additional series, an initial capital contribution of $ 3,000 1,000 On November 14, 2011, USCF received 40 Sponsor Shares of CPER in exchange for the previously received capital contribution, representing a beneficial interest in CPER. On December 7, 2011, USCF redeemed the 40 Sponsor Shares of CPER and purchased 40 shares of CPER in the open market. On April 13, 2012, USCF received 40 Sponsor Shares of USAG in exchange for the previously received capital contribution, representing a beneficial interest in USAG. On June 28, 2012, USCF redeemed the 40 Sponsor Shares of USAG and on October 3, 2012, purchased 5 shares of USAG on the open market. CPER and USAG received notice of effectiveness from the SEC for its registration of 30,000,000 20,000,000 25 100,000 2,500,000 1,000 On April 13, 2012, USAG listed its shares on the NYSE Arca under the ticker symbol “USAG.” USAG established its initial per share NAV by setting the price at $ 25 1,000 In connection with the Third Amended and Restated Declaration of Trust, dated March 22, 2013, a new series of the Trust was designated on June 1, 2016, the USCF Canadian Crude Oil Index Fund (“UCCO”). UCCO is currently in registration and USCI’s Investment Objective USCI invests in futures contracts for commodities that are currently traded on the New York Mercantile Exchange (the “NYMEX”), ICE Futures (“ICE Futures”), Chicago Board of Trade (“CBOT”), Chicago Mercantile Exchange (“CME”), London Metal Exchange (“LME”), Commodity Exchange, Inc. (“COMEX”) or on other foreign exchanges (the NYMEX, ICE Futures, CBOT, CME, LME, COMEX and other foreign exchanges, collectively, the “Futures Exchanges”) (such futures contracts, collectively, “Futures Contracts”) and, to a lesser extent, in order to comply with regulatory requirements or in view of market conditions, other commodity-based contracts and instruments such as cash-settled options on Futures Contracts, forward contracts relating to commodities, cleared swap contracts and other non-exchange traded over-the-counter (“OTC”) transactions that are based on the price of commodities and Futures Contracts (collectively, “Other Commodity-Related Investments”). Market conditions that USCF currently anticipates could cause USCI to invest in Other Commodity Related Investments would be those allowing USCI to obtain greater liquidity or to execute transactions with more favorable pricing. Futures Contracts and Other Commodity-Related Investments collectively are referred to as “Commodity Interests.” The investment objective of USCI is for the daily changes in percentage terms of its shares’ per share NAV to reflect the daily changes in percentage terms of the SummerHaven Dynamic Commodity Index Total Return SM USCI’s shares began trading on August 10, 2010. As of June 30, 2017, USCI held 1,591 992 1,719 2,475 5,997 769 13,543 CPER’s Investment Objective The investment objective of CPER is for the daily changes in percentage terms of its shares’ per share NAV to reflect the daily changes in percentage terms of the SummerHaven Copper Index Total Return SM CPER seeks to achieve its investment objective by investing to the fullest extent possible in the Benchmark Component Copper Futures Contracts. Then, if constrained by regulatory requirements or in view of market conditions, CPER will invest next in other Eligible Copper Futures Contracts, and finally to a lesser extent, in other exchange traded futures contracts that are economically identical or substantially similar to the Benchmark Component Copper Futures Contracts if one or more other Eligible Copper Futures Contracts is not available. When CPER has invested to the fullest extent possible in exchange-traded futures contracts, CPER may then invest in other contracts and instruments based on the Benchmark Component Copper Futures Contracts, other Eligible Copper Futures Contracts or copper, such as cash-settled options, forward contracts, cleared swap contracts and swap contracts other than cleared swap contracts. Other exchange-traded futures contracts that are economically identical or substantially similar to the Benchmark Component Copper Futures Contracts and other contracts and instruments based on the Benchmark Component Copper Futures Contracts, are referred to as “Other Copper-Related Investments,” and together with Benchmark Component Copper Futures Contracts and other Eligible Copper Futures Contracts, “Copper Interests.” CPER’s shares began trading on November 15, 2011. As of June 30, 2017, CPER held 193 USAG’s Investment Objective The investment objective of USAG is for the daily changes in percentage terms of its shares’ per share NAV to reflect the daily changes in percentage terms of the SummerHaven Dynamic Agriculture Index Total Return SM USAG seeks to achieve its investment objective by investing to the fullest extent possible in the Benchmark Component Agriculture Futures Contracts. Then, if constrained by regulatory requirements or in view of market conditions, USAG will invest next in other Eligible Agriculture Futures Contracts based on the same agricultural commodity as the futures contracts subject to such regulatory constraints or market conditions, and finally, to a lesser extent, in other exchange traded futures contracts that are economically identical or substantially similar to the Benchmark Component Agriculture Futures Contracts if one or more other Eligible Agriculture Futures Contracts is not available. When USAG has invested to the fullest extent possible in exchange-traded futures contracts, USAG may then invest in other contracts and instruments based on the Benchmark Component Agriculture Futures Contracts, other Eligible Agriculture Futures Contracts or the agricultural commodities included in the SDAI, such as cash-settled options, forward contracts, cleared swap contracts and swap contracts other than cleared swap contracts. Other exchange-traded futures contracts that are economically identical or substantially similar to the Benchmark Component Agriculture Futures Contracts and other contracts and instruments based on the Benchmark Component Agriculture Futures Contracts, as well as metals included in the SDAI, are collectively referred to as “Other Agriculture-Related Investments,” and together with Benchmark Component Agriculture Futures Contracts and other Eligible Agriculture Futures Contracts, “Agriculture Interests.” USAG’s shares began trading on April 13, 2012. As of June 30, 2017, USAG held 33 26 11 4 74 Other Defined Terms Trust Series The SDCI, the SCI and the SDAI are referred to throughout these Notes to Financial Statements collectively as the “Applicable Index” or “Indices.” Benchmark Component Futures Contracts, Benchmark Component Copper Futures Contracts and Benchmark Component Agriculture Futures Contracts are referred to throughout these Notes to Condensed Financial Statements collectively as “Applicable Benchmark Component Futures Contracts.” Other Commodity-Related Investments, Other Copper-Related Investments and Other Agriculture-Related Interests are referred to throughout these Notes to Condensed Financial Statements collectively as “Other Related Investments.” Trading Advisor and Trustee The Trust Series’ trading advisor is SummerHaven Investment Management, LLC (“SummerHaven”), a Delaware limited liability company that is registered as a commodity trading advisor and CPO with the CFTC and is a member of the NFA. SummerHaven provides advisory services to USCF with respect to the Applicable Index of each Trust Series and the investment decisions of each Trust Series. The Trustee accepts service of legal process on the Trust in the State of Delaware and makes certain filings under the Delaware Statutory Trust Act. The Trustee does not owe any other duties to the Trust, USCF or the shareholders.

FEES PAID BY EACH TRUST SERIES

FEES PAID BY EACH TRUST SERIES AND RELATED PARTY TRANSACTIONS	6 Months Ended
	Jun. 30, 2017
Fees Paid By Usci and Cper and Related Party Transactions [Abstract]
Fees Paid By Each Trust Series And Related Party Transactions	NOTE 4 - FEES PAID BY EACH TRUST SERIES AND RELATED PARTY TRANSACTIONS USCF Management Fee Under the Trust Agreement, USCF is responsible for investing the assets of each Trust Series in accordance with the objectives and policies of each such Trust Series. In addition, USCF has arranged for one or more third parties to provide trading advisory, administrative, custody, accounting, transfer agency and other necessary services to each Trust Series. For these services, each of USCI, CPER and USAG is contractually obligated to pay USCF a fee, which is paid monthly, equal to 0.95 0.80 0.65 Trustee Fee The Trustee is the Delaware trustee of the Trust. In connection with the Trustee’s services, USCF is responsible for paying the Trustee’s annual fee in the amount of $ 3,000 Ongoing Registration Fees and Other Offering Expenses Each Trust Series pays the costs and expenses associated with the ongoing registration of its shares subsequent to the initial offering. These costs include registration or other fees paid to regulatory agencies in connection with the offer and sale of shares, and all legal, accounting, printing and other expenses associated with such offer and sale. During the six months ended June 30, 2017 and 2016, no Trust Series incurred any registration fees or other offering expenses. Independent Directors’ and Officers’ Expenses Each Trust Series is responsible for paying its portion of the directors’ fees and directors’ and officers’ liability insurance for such Trust Series and the Related Public Funds. Each Trust Series shares the fees and expenses on a pro rata basis with each other Trust Series and each Related Public Fund, as described above, based on the relative assets of each fund computed on a daily basis. These fees and expenses for the year ended December 31, 2017, are estimated to be a total of $ 539,350 71,700 1,500 1,500 Investor Tax Reporting Cost The fees and expenses associated with each Trust Series’ audit expenses and tax accounting and reporting requirements are paid by such Trust Series. These costs are estimated to be $ 600,000 45,000 40,000 Other Expenses and Fees and Expense Waivers In addition to the fees described above, each Trust Series pays all brokerage fees and other expenses in connection with the operation of such Trust Series, excluding costs and expenses paid by USCF as outlined in Note 5 Contracts and Agreements 0.15 25,086 22,554 Note 5 Contracts and Agreements

CONTRACTS AND AGREEMENTS

CONTRACTS AND AGREEMENTS	6 Months Ended
CONTRACTS AND AGREEMENTS	Jun. 30, 2017
Contractors [Abstract]
Contracts And Agreements	Marketing Agent Agreement USCF and the Trust, each on its own behalf and on behalf of each Trust Series, are party to a marketing agent agreement, dated as of July 22, 2010, as amended from time to time, with the Marketing Agent, whereby the Marketing Agent provides certain marketing services for each Trust Series as outlined in the agreement. The fee of the Marketing Agent, which is borne by USCF, is equal to 0.06 3 0.04 3 10 The above fee does not include website construction and development, which are also borne by USCF. Brown Brothers Harriman & Co. Agreements USCF and the Trust, on its own behalf and on behalf of each Trust Series, are also party to a custodian agreement, dated July 22, 2010, as amended from time to time, with Brown Brothers Harriman & Co. (“BBH&Co.”), whereby BBH&Co. holds investments on behalf of each Trust Series. USCF pays the fees of the custodian, which are determined by the parties from time to time. In addition, USCF and the Trust, on its own behalf and on behalf of each Trust Series, are party to an administrative agency agreement, dated July 22, 2010, as amended from time to time, with BBH&Co., whereby BBH&Co. acts as the administrative agent, transfer agent and registrar for each Trust Series. USCF also pays the fees of BBH&Co. for its services under such agreement and such fees are determined by the parties from time to time. Currently, USCF pays BBH&Co. for its services, in the foregoing capacities, a minimum amount of $ 75,000 20,000 0.06 500 0.0465 500 1 0.035 1 7 15 Brokerage and Futures Commission Merchant Agreements On July 7, 2014, the Trust on behalf of each Trust Series entered into a Futures and Cleared Swaps Agreement with Wells Fargo Securities, LLC (“WFS”). WFS is referred to as the “Futures Commissions Merchant” or “FCM.” The agreements require the FCM to provide services to each Trust Series in connection with the purchase and sale of Futures Contracts and Other Related Investments that may be purchased and sold by or through the FCM for each Trust Series’ account. In accordance with the agreement, the FCM charges each Trust Series commissions of approximately $ 7 8 For the six For the six Total commissions accrued to brokers $ 352,006 $ 359,905 Total commissions as an annualized percentage of average total net assets 0.13 % 0.14 % Commissions accrued as a result of rebalancing $ 334,029 $ 346,525 Percentage of commissions accrued as a result of rebalancing 94.89 % 96.28 % Commissions accrued as a result of creation and redemption activity $ 17,977 $ 13,380 Percentage of commissions accrued as a result of creation and redemption activity 5.11 % 3.72 % The decrease in USCI’s total commissions accrued to brokers for the six months ended June 30, 2017, compared to the six months ended June 30, 2016, was primarily due to a decrease in the number of contracts traded during the rebalancing periods. For the six For the six Total commissions accrued to brokers $ 3,580 $ 896 Total commissions as an annualized percentage of average total net assets 0.06 % 0.07 % Commissions accrued as a result of rebalancing $ 2,900 $ 800 Percentage of commissions accrued as a result of rebalancing 81.01 % 89.29 % Commissions accrued as a result of creation and redemption activity $ 680 $ 96 Percentage of commissions accrued as a result of creation and redemption activity 18.99 % 10.71 % CPER’s total commissions accrued to brokers for the six months ended June 30, 2017, compared to the six months ended June 30, 2016, increased due to the higher level of creation activity during the six month period. For the six For the six Total commissions accrued to brokers $ 938 $ 1,016 Total commissions as an annualized percentage of average total net assets 0.10 % 0.10 % Commissions accrued as a result of rebalancing $ 938 $ 1,016 Percentage of commissions accrued as a result of rebalancing 100.00 % 100.00 % Commissions accrued as a result of creation and redemption activity $ $ Percentage of commissions accrued as a result of creation and redemption activity % % USAG’s total commissions accrued to brokers for the six months ended June 30, 2017, compared to the six months ended June 30, 2016, decreased slightly due to the lower SummerHaven Agreements USCF is party to an Amended Advisory Agreement, dated July 1, 2011, as amended from time to time, with SummerHaven, whereby SummerHaven provides advisory services to USCF with respect to the Applicable Index for each Trust Series and investment decisions for each Trust Series. SummerHaven’s advisory services include, but are not limited to, general consultation regarding the calculation and maintenance of the Applicable Index for each Trust Series, anticipated changes to each Applicable Index and the nature of each Applicable Index’s current or anticipated component securities. For these services, USCF pays SummerHaven a fee based on a percentage of the average total net assets of each Trust Series. For USCI, the fee is 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. For each of CPER and USAG, the fee is equal to the percentage fees paid to USCF minus 0.18%, with that result multiplied by 0.5, minus 0.06% to arrive at the actual fee paid. USCF is also party to an Amended Licensing Agreement, dated July 1, 2011, as amended from time to time, with SummerHaven, whereby SummerHaven sub-licensed to each Trust Series the use of certain names and marks, including the Applicable Index for each Trust Series for which SummerHaven has a sub-license from SHIM, the owner of each Applicable Index. Under the Licensing Agreement, USCF paid SummerHaven an annual fee of $ 15,000 plus an annual fee of 0.06% of the average daily total net assets of each Trust Series.

FINANCIAL INSTRUMENTS, OFF-BALA

FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES	6 Months Ended
	Jun. 30, 2017
Risks and Uncertainties [Abstract]
Financial Instruments, Off-Balance Sheet Risks and Contingencies	NOTE 6 FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES Each Trust Series engages in the trading of futures contracts, options on futures contracts and cleared swaps (collectively, “derivatives”). As such, each Trust Series is exposed to both market risk, which is the risk arising from changes in the market value of the contracts, and credit risk, which is the risk of failure by another party to perform according to the terms of a contract. Each Trust Series may enter into futures contracts and options on futures contracts to gain exposure to changes in the value of an underlying commodity. A futures contract obligates the seller to deliver (and the purchaser to accept) the future delivery of a specified quantity and type of a commodity at a specified time and place. Some futures contracts may call for physical delivery of the asset, while others are settled in cash. The contractual obligations of a buyer or seller may generally be satisfied by taking or making physical delivery of the underlying commodity or by making an offsetting sale or purchase of an identical futures contract on the same or linked exchange before the designated date of delivery. Cleared swaps are agreements that are eligible to be cleared by a clearinghouse, e.g., The purchase and sale of futures contracts and options on futures contracts require margin deposits with an FCM. Additional deposits may be necessary for any loss on contract value. The Commodity Exchange Act requires an FCM to segregate all customer transactions and assets from the FCM’s proprietary activities. Futures contracts, options on futures contracts and cleared swaps involve, to varying degrees, elements of market risk (specifically commodity price risk) and exposure to loss in excess of the amount of variation margin. The face or contract amounts reflect the extent of the total exposure each Trust Series has in the particular classes of instruments. Additional risks associated with the use of futures contracts are an imperfect correlation between movements in the price of the futures contracts and the market value of the underlying securities and the possibility of an illiquid market for a futures contract. Buying and selling options on futures contracts exposes investors to the risks of purchasing or selling futures contracts. All of the Futures Contracts held by each Trust Series were exchange-traded through June 30, 2017. The risks associated with exchange-traded contracts are generally perceived to be less than those associated with OTC swaps since, in OTC swaps, a party must rely solely on the credit of its respective individual counterparties. However, in the future if each Trust Series were to enter into non-exchange traded contracts (including Exchange for Related Position or EFRP), it would be subject to the credit risk associated with counterparty non-performance. The credit risk from counterparty non-performance associated with such instruments is the net unrealized gain, if any, on the transaction. Currently, each Trust Series has credit risk under its futures contracts since the sole counterparty to all domestic and foreign futures contracts is the clearinghouse for the exchange on which the relevant contracts are traded. In addition, each Trust Series bears the risk of financial failure by the clearing broker. A Trust Series’ cash and other property, such as Treasuries, deposited with an FCM are considered commingled with all other customer funds, subject to the FCM’s segregation requirements. In the event of an FCM’s insolvency, recovery may be limited to a pro rata share of segregated funds available. It is possible that the recovered amount could be less than the total of cash and other property deposited. The insolvency of an FCM could result in the complete loss of a Trust Series’ assets posted with that FCM; however, the majority of each Trust Series’ assets are held in Treasuries, cash and/or cash equivalents with the Trust Series’ custodian and would not be impacted by the insolvency of an FCM. The failure or insolvency of the Trust Series’ custodian, however, could result in a substantial loss of each Trust Series’ assets. USCF may invest a portion of each Trust Series’ cash in money market funds that seek to maintain a stable per share NAV. Each Trust Series may be exposed to any risk of loss associated with an investment in such money market funds. As of June 30, 2017 and December 31, 2016, none of the Trust Series held investments in money market funds. Each Trust Series holds cash deposits with its custodian. Pursuant to a written agreement with BBH&Co., uninvested overnight cash balances are swept to offshore branches of U.S. regulated and domiciled banks located in Toronto, Canada; London, United Kingdom; Grand Cayman, Cayman Islands; and Nassau, Bahamas; which are subject to U.S. regulation and regulatory oversight. As of June 30, 2017 and December 31, 2016, USCI held cash deposits and investments in Treasuries in the amounts of $ 491,758,955 641,316,546 12,754,788 5,640,820 1,868,335 1,989,821 For derivatives, risks arise from changes in the market value of the contracts. Theoretically, each Trust Series is exposed to market risk equal to the value of Futures Contracts purchased and unlimited liability on such contracts sold short. As both a buyer and a seller of options, each Trust Series pays or receives a premium at the outset and then bears the risk of unfavorable changes in the price of the contract underlying the option. The Trust Series’ policy is to continuously monitor its exposure to market and counterparty risk through the use of a variety of financial, position and credit exposure reporting controls and procedures. In addition, the Trust Series or USCF have a policy of requiring review of the credit standing of each broker or counterparty with which they conduct business. The financial instruments held by the applicable Trust Series are reported in its condensed statements of financial condition at market or fair value, or at carrying amounts that approximate fair value, because of their highly liquid nature and short-term maturity.

FINANCIAL HIGHLIGHTS

FINANCIAL HIGHLIGHTS	6 Months Ended
FINANCIAL HIGHLIGHTS	Jun. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Financial Highlights	NOTE 7 FINANCIAL HIGHLIGHTS USCI For the six For the six Per Share Operating Performance: Net asset value, beginning of period $ 40.02 $ 40.52 Total income (loss) (1.35) 2.77 Net expenses (0.21) (0.22) Net increase (decrease) in net asset value (1.56) 2.55 Net asset value, end of period $ 38.46 $ 43.07 Total Return (3.90) % 6.29 % Ratios to Average Net Assets Total income (loss) (3.49) % 6.84 % Management fees* 0.80 % 0.80 % Total expenses excluding management fees* 0.25 % 0.26 % Expenses waived* % % Net expenses excluding management fees* 0.25 % 0.26 % Net income (loss) (4.01) % 6.31 % * Annualized. ** Effective January 1, 2016 USCF permanently lowered the management fee to 0.80 CPER For the six For the six Per Share Operating Performance: Net asset value, beginning of period $ 16.36 $ 14.24 Total income (loss) 1.21 0.34 Net expenses (0.07) (0.06) Net increase (decrease) in net asset value 1.14 0.28 Net asset value, end of period $ 17.50 $ 14.52 Total Return 6.97 % 1.97 % Ratios to Average Net Assets Total income (loss) 4.38 % 0.75 % Management fees* 0.65 % 0.65 % Total expenses excluding management fees* 0.59 % 2.89 % Expenses waived* (0.44) % (2.74 )% Net expenses excluding management fees* 0.15 % 0.15 % Net income (loss) 3.98 % 0.35 % * Annualized. ** Effective January 1, 2016 USCF permanently lowered the management fee to 0.65 USCF paid certain expenses on a discretionary basis typically borne by CPER where expenses exceeded 0.15 USAG For the six For the six Per Share Operating Performance: Net asset value, beginning of period $ 19.01 $ 19.80 Total income (loss) (0.24) 1.61 Net expenses (0.08) (0.08) Net increase (decrease) in net asset value (0.32) 1.53 Net asset value, end of period $ 18.69 $ 21.33 Total Return (1.68) % 7.73 % Ratios to Average Net Assets Total income (loss) (1.26) % 8.05 % Management fees* 0.65 % 0.65 % Total expenses excluding management fees* 2.53 % 3.33 % Expenses waived* (2.38 )% (3.18 )% Net expenses excluding management fees* 0.15 % 0.15 % Net income (loss) (1.66) % 7.65 % * Annualized. ** Effective January 1, 2016, USCF permanently lowered the management fee to 0.65 USCF paid certain expenses on a discretionary basis typically borne by USAG where expenses exceeded 0.15% (15 basis points) of USAG’s NAV, on an annualized basis. USCF has no obligation to continue such payments into subsequent periods. Total returns are calculated based on the change in value during the period. An individual shareholder’s total return and ratio may vary from the above total returns and ratios based on the timing of contributions to and withdrawals from each Trust Series.

FAIR VALUE OF FINANCIAL INSTRUM

FAIR VALUE OF FINANCIAL INSTRUMENTS	6 Months Ended
FAIR VALUE OF FINANCIAL INSTRUMENTS	Jun. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Of Financial Instruments	NOTE 8 FAIR VALUE OF FINANCIAL INSTRUMENTS The Trust and each Trust Series value their investments in accordance with Accounting Standards Codification 820 Fair Value Measurements and Disclosures (“ASC 820”). ASC 820 defines fair value, establishes a framework for measuring fair value in generally accepted accounting principles, and expands disclosures about fair value measurement. The changes to past practice resulting from the application of ASC 820 relate to the definition of fair value, the methods used to measure fair value, and the expanded disclosures about fair value measurement. ASC 820 establishes a fair value hierarchy that distinguishes between: (1) market participant assumptions developed based on market data obtained from sources independent of the Trust and each Trust Series (observable inputs) and (2) the Trust’s and each Trust Series’ own assumptions about market participant assumptions developed based on the best information available under the circumstances (unobservable inputs). The three levels defined by the ASC 820 hierarchy are as follows: Level I Quoted prices (unadjusted) in active markets for identical Level II Inputs other than quoted prices included within Level I that are observable for the asset or liability, either directly or indirectly. Level II assets include the following: quoted prices for similar Level III Unobservable pricing input at the measurement date for the asset or liability. Unobservable inputs shall be used to measure fair value to the extent that observable inputs are not available. In some instances, the inputs used to measure fair value might fall within different levels of the fair value hierarchy. The level in the fair value hierarchy within which the fair value measurement in its entirety falls shall be determined based on the lowest input level that is significant to the fair value measurement in its entirety. The following table summarizes the valuation of USCI’s securities at June 30, 2017 using the fair value hierarchy: At June 30, 2017 Total Level I Level II Level III Short-Term Investments $ 376,592,713 $ 376,592,713 $ $ Exchange-Traded Futures Contracts Foreign Contracts (12,956,160) (12,956,160) United States Contracts 605,821 605,821 During the six months ended June 30, 2017, there were no transfers between Level I and Level II. The following table summarizes the valuation of USCI’s securities at December 31, 2016 using the fair value hierarchy: At December 31, 2016 Total Level I Level II Level III Short-Term Investments $ 514,192,445 $ 514,192,445 $ $ Exchange-Traded Futures Contracts Foreign Contracts (3,366,242) (3,366,242) United States Contracts 5,421,702 5,421,702 During the year ended December 31, 2016, there were no transfers between Level I and Level II. The following table summarizes the valuation of CPER’s securities at June 30, 2017 using the fair value hierarchy: At June 30, 2017 Total Level I Level II Level III Short-Term Investments $ 9,823,192 $ 9,823,192 $ $ Exchange-Traded Futures Contracts United States Contracts 385,713 385,713 During the six months ended June 30, 2017, there were no transfers between Level I and Level II. The following table summarizes the valuation of CPER’s securities at December 31, 2016 using the fair value hierarchy: At December 31, 2016 Total Level I Level II Level III Short-Term Investments $ 4,541,320 $ 4,541,320 $ $ Exchange-Traded Futures Contracts United States Contracts 88,575 88,575 During the year ended December 31, 2016, there were no transfers between Level I and Level II. The following table summarizes the valuation of USAG’s securities at June 30, 2017 using the fair value hierarchy: At June 30, 2017 Total Level I Level II Level III Short-Term Investments $ 1,197,553 $ 1,197,553 $ $ Exchange-Traded Futures Contracts Foreign Contracts (34,779) (34,779) United States Contracts 36,957 36,957 During the six months ended June 30, 2017, there were no transfers between Level I and Level II. The following table summarizes the valuation of USAG’s securities at December 31, 2016 using the fair value hierarchy: At December 31, 2016 Total Level I Level II Level III Short-Term Investments $ 1,397,843 $ 1,397,843 $ $ Exchange-Traded Futures Contracts Foreign Contracts (90,442) (90,442) United States Contracts 742 742 During the year ended December 31, 2016, there were no transfers between Level I and Level II. The Trust and each Trust Series have adopted the provisions of Accounting Standards Codification 815 Derivatives and Hedging, which require presentation of qualitative disclosures about objectives and strategies for using derivatives, quantitative disclosures about fair value amounts and gains and losses on derivatives. Derivatives not Accounted for Condensed Fair Value Fair Value Futures - Commodity Contracts Assets $ (12,350,339) $ 2,055,460 Fair Value of Derivative Instruments Held by CPER Derivatives not Accounted for Condensed Fair Value Fair Value Futures - Commodity Contracts Assets $ 385,713 $ 88,575 Fair Value of Derivative Instruments Held by USAG Derivatives not Accounted for Condensed Fair Value Fair Value Futures - Commodity Contracts Assets $ 2,178 $ (89,700) For the six months ended For the six months ended Derivatives Location of Realized Change in Realized Change in Futures Commodity Contracts Realized gain (loss) on closed contracts $ (6,268,334) $ 15,028,812 Change in unrealized gain (loss) on open contracts $ (14,405,799) $ 20,509,156 The Effect of Derivative Instruments on the Condensed Statements of Operations of CPER For the six months ended For the six months ended Derivatives Location of Realized Change in Realized Change in Futures Commodity Contracts Realized gain (loss) on closed contracts $ 171,775 $ (246,050) Change in unrealized gain (loss) on open contracts $ 297,138 $ 260,863 The Effect of Derivative Instruments on the Condensed Statements of Operations of USAG For the six months ended For the six months ended Derivatives Location of Realized Change in Realized Change in Futures Commodity Contracts Realized gain (loss) on closed contracts $ (121,505) $ 73,847 Change in unrealized gain (loss) on open contracts $ 91,878 $ 83,436

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	6 Months Ended
SUBSEQUENT EVENTS	Jun. 30, 2017
Subsequent Events [Abstract]
Subsequent Events	NOTE 9 SUBSEQUENT EVENTS The Trust and each Trust Series have performed an evaluation of subsequent events through the date the condensed financial statements were issued. This evaluation did not result in any subsequent events that necessitated disclosures and/or adjustments.

SUMMARY OF SIGNIFICANT ACCOUN17

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	6 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	Jun. 30, 2017
Basis of Presentation	Basis of Presentation The financial statements have been prepared in conformity with U.S. GAAP as detailed in the Financial Accounting Standards Board’s (“FASB”) Accounting Standards Codification. Each Trust Series is an investment company and follows the accounting and reporting guidance in FASB Topic 946. The Trust financial statements included its respective series of funds financial statements including USCI, CPER, and USAG through March 31, 2015. For reporting commencing with the June 30, 2015 reporting period, and in conjunction with the termination of USMI on March 18, 2015 the USMI financial statements have not been included, but are included in the overall Trust financial statements for the applicable reporting periods.
Revenue Recognition	Revenue Recognition Commodity futures contracts, forward contracts, physical commodities, and related options are recorded on the trade date. All such transactions are recorded on the identified cost basis and marked to market daily. Unrealized gains or losses on open contracts are reflected in the condensed statements of financial condition and represent the difference between the original contract amount and the market value (as determined by exchange settlement prices for futures contracts and related options and cash dealer prices at a predetermined time for forward contracts, physical commodities, and their related options) as of the last business day of the year or as of the last date of the condensed financial statements. Changes in the unrealized gains or losses between periods are reflected in the condensed statements of operations. Each Trust Series earns income on funds held at the custodian or futures commission merchant (“FCM”) at prevailing market rates earned on such investments.
Brokerage Commissions	Brokerage Commissions Brokerage commissions on all open commodity futures contracts are accrued on a full-turn basis.
Income Taxes	Income Taxes The Trust Series are not subject to federal income taxes; each investor reports his/her allocable share of income, gain, loss deductions or credits on his/her own income tax return. In accordance with U.S. GAAP, each Trust Series is required to determine whether a tax position is more likely than not to be sustained upon examination by the applicable taxing authority, including resolution of any tax related appeals or litigation processes, based on the technical merits of the position. Each Trust Series files an income tax return in the U.S. federal jurisdiction, and may file income tax returns in various U.S. states. None of the Trust Series is subject to income tax return examinations by major taxing authorities for years before 2013. The tax benefit recognized is measured as the largest amount of benefit that has a greater than fifty percent likelihood of being realized upon ultimate settlement. De-recognition of a tax benefit previously recognized results in each Trust Series recording a tax liability that reduces net assets. However, each Trust Series’ conclusions regarding this policy may be subject to review and adjustment at a later date based on factors including, but not limited to, on-going analysis of and changes to tax laws, regulations and interpretations thereof. Each Trust Series recognizes interest accrued related to unrecognized tax benefits and penalties related to unrecognized tax benefits in income tax fees payable, if assessed. No interest expense or penalties have been recognized as of and for the period ended June 30, 2017 for any Trust Series.
Trust Capital and Allocation of Income and Losses	Trust Capital and Allocation of Income and Losses Profit or loss shall be allocated among the shareholders of each Trust Series in proportion to the number of shares each investor holds as of the close of each month. USCF may revise, alter or otherwise modify this method of allocation as described in the Trust Agreement.
Creations and Redemptions	Creations and Redemptions Effective as of May 1, 2012, Authorized Participants may purchase Creation Baskets or redeem Redemption Baskets for USCI, CPER and USAG only in blocks of 50,000 shares at a price equal to the NAV of the shares calculated shortly after the close of the core trading session on the NYSE Arca on the day the order is placed. Each Trust Series receives or pays the proceeds from shares sold or redeemed within three business days after the trade date of the purchase or redemption. The amounts due from Authorized Participants are reflected in each Trust Series’ condensed statements of financial condition as receivable for shares sold, and amounts payable to Authorized Participants upon redemption are reflected as payable for shares redeemed. Authorized Participants pay each Trust Series a transaction fee of $350 for each order placed to create one or more Creation Baskets or to redeem one or more Redemption Baskets.
Calculation of NAV	Calculation of Per Share NAV Each Trust Series’ per share NAV is calculated on each NYSE Arca trading day by taking the current market value of its total assets, subtracting any liabilities and dividing the amount by the total number of shares issued and outstanding. Each Trust Series uses the closing prices on the relevant Futures Exchanges (as defined in Note 3 below) of the Applicable Benchmark Component Futures Contracts (as defined in Note 3 below) that at any given time make up the Applicable Index (as defined in Note 3 below) (determined at the earlier of the close of such exchange or 2:30 p.m. New York time) for the contracts traded on the Futures Exchanges, but calculates or determines the value of all other investments of each Trust Series using market quotations, if available, or other information customarily used to determine the fair value of such investments.
Net Income (Loss) Per Share	Net Income (Loss) Per Share Net income (loss) per share is the difference between the per share NAV at the beginning of each period and the per share NAV at the end of each period. The weighted average number of shares outstanding was computed for purposes of disclosing net income (loss) per weighted average share. The weighted average shares are equal to the number of shares outstanding at the end of the period, adjusted proportionately for shares added and redeemed based on the amount of time the shares were outstanding during such period. As of June 30, 2017, USCF held 5 shares of USCI, 40 shares of CPER and 5 shares of USAG.
Offering Costs	Offering Costs Offering costs incurred in connection with the registration of shares prior to the commencement of the offering are borne by USCF. Offering costs incurred in connection with the registration of additional shares after the commencement of the offering are borne by each Trust Series. These costs include registration fees paid to regulatory agencies and all legal, accounting, printing and other expenses associated with such offerings. Costs borne by the Trust Series after the commencement of an offering are accounted for as a deferred charge and thereafter amortized to expense over twelve months on a straight-line basis or a shorter period if warranted.
Cash Equivalents	Cash Equivalents Cash equivalents include money market funds and overnight deposits or time deposits with original maturity dates of six months or less.
Reclassifications	Reclassifications Certain prior year amounts have been reclassified to conform to the current year presentation.
Use of Estimates	Use of Estimates The preparation of condensed financial statements in conformity with U.S. GAAP requires USCF to make estimates and assumptions that affect the reported amount of assets and liabilities and disclosure of contingent assets and liabilities at the date of the condensed financial statements, and the reported amounts of the revenue and expenses during the reporting period. Actual results may differ from those estimates and assumptions.

CONTRACTS AND AGREEMENTS (Table

CONTRACTS AND AGREEMENTS (Tables)	6 Months Ended
CONTRACTS AND AGREEMENTS (Tables)	Jun. 30, 2017
Contractors [Abstract]
Brokerage Commissions	USCI For the six For the six Total commissions accrued to brokers $ 352,006 $ 359,905 Total commissions as an annualized percentage of average total net assets 0.13 % 0.14 % Commissions accrued as a result of rebalancing $ 334,029 $ 346,525 Percentage of commissions accrued as a result of rebalancing 94.89 % 96.28 % Commissions accrued as a result of creation and redemption activity $ 17,977 $ 13,380 Percentage of commissions accrued as a result of creation and redemption activity 5.11 % 3.72 % CPER For the six For the six Total commissions accrued to brokers $ 3,580 $ 896 Total commissions as an annualized percentage of average total net assets 0.06 % 0.07 % Commissions accrued as a result of rebalancing $ 2,900 $ 800 Percentage of commissions accrued as a result of rebalancing 81.01 % 89.29 % Commissions accrued as a result of creation and redemption activity $ 680 $ 96 Percentage of commissions accrued as a result of creation and redemption activity 18.99 % 10.71 % USAG For the six For the six Total commissions accrued to brokers $ 938 $ 1,016 Total commissions as an annualized percentage of average total net assets 0.10 % 0.10 % Commissions accrued as a result of rebalancing $ 938 $ 1,016 Percentage of commissions accrued as a result of rebalancing 100.00 % 100.00 % Commissions accrued as a result of creation and redemption activity $ $ Percentage of commissions accrued as a result of creation and redemption activity % %

FINANCIAL HIGHLIGHTS (Tables)

FINANCIAL HIGHLIGHTS (Tables)	6 Months Ended
FINANCIAL HIGHLIGHTS (Tables)	Jun. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Per Unit Performance Data and Other Supplemental Financial Data for Usci, Cper, Usag and Usmi	The following tables present per share performance data and other supplemental financial data for each Trust Series for the six months ended June 30, 2017 and 2016 for the shareholders. This information has been derived from information presented in the condensed financial statements. USCI For the six For the six Per Share Operating Performance: Net asset value, beginning of period $ 40.02 $ 40.52 Total income (loss) (1.35) 2.77 Net expenses (0.21) (0.22) Net increase (decrease) in net asset value (1.56) 2.55 Net asset value, end of period $ 38.46 $ 43.07 Total Return (3.90) % 6.29 % Ratios to Average Net Assets Total income (loss) (3.49) % 6.84 % Management fees* 0.80 % 0.80 % Total expenses excluding management fees* 0.25 % 0.26 % Expenses waived* % % Net expenses excluding management fees* 0.25 % 0.26 % Net income (loss) (4.01) % 6.31 % * Annualized. ** Effective January 1, 2016 USCF permanently lowered the management fee to 0.80 CPER For the six For the six Per Share Operating Performance: Net asset value, beginning of period $ 16.36 $ 14.24 Total income (loss) 1.21 0.34 Net expenses (0.07) (0.06) Net increase (decrease) in net asset value 1.14 0.28 Net asset value, end of period $ 17.50 $ 14.52 Total Return 6.97 % 1.97 % Ratios to Average Net Assets Total income (loss) 4.38 % 0.75 % Management fees* 0.65 % 0.65 % Total expenses excluding management fees* 0.59 % 2.89 % Expenses waived* (0.44) % (2.74 )% Net expenses excluding management fees* 0.15 % 0.15 % Net income (loss) 3.98 % 0.35 % * Annualized. ** Effective January 1, 2016 USCF permanently lowered the management fee to 0.65 USCF paid certain expenses on a discretionary basis typically borne by CPER where expenses exceeded 0.15 USAG For the six For the six Per Share Operating Performance: Net asset value, beginning of period $ 19.01 $ 19.80 Total income (loss) (0.24) 1.61 Net expenses (0.08) (0.08) Net increase (decrease) in net asset value (0.32) 1.53 Net asset value, end of period $ 18.69 $ 21.33 Total Return (1.68) % 7.73 % Ratios to Average Net Assets Total income (loss) (1.26) % 8.05 % Management fees* 0.65 % 0.65 % Total expenses excluding management fees* 2.53 % 3.33 % Expenses waived* (2.38 )% (3.18 )% Net expenses excluding management fees* 0.15 % 0.15 % Net income (loss) (1.66) % 7.65 % * Annualized. ** Effective January 1, 2016, USCF permanently lowered the management fee to 0.65 USCF paid certain expenses on a discretionary basis typically borne by USAG where expenses exceeded 0.15% (15 basis points) of USAG’s NAV, on an annualized basis. USCF has no obligation to continue such payments into subsequent periods.

FAIR VALUE OF FINANCIAL INSTR20

FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)	6 Months Ended
FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)	Jun. 30, 2017
Fair Value Disclosures [Abstract]
Valuation of Usci's, Cper's, Usag's and Usmi's Securities Using Fair Value Hierarchy	The following table summarizes the valuation of USCI’s securities at June 30, 2017 using the fair value hierarchy: At June 30, 2017 Total Level I Level II Level III Short-Term Investments $ 376,592,713 $ 376,592,713 $ $ Exchange-Traded Futures Contracts Foreign Contracts (12,956,160) (12,956,160) United States Contracts 605,821 605,821 During the six months ended June 30, 2017, there were no transfers between Level I and Level II. The following table summarizes the valuation of USCI’s securities at December 31, 2016 using the fair value hierarchy: At December 31, 2016 Total Level I Level II Level III Short-Term Investments $ 514,192,445 $ 514,192,445 $ $ Exchange-Traded Futures Contracts Foreign Contracts (3,366,242) (3,366,242) United States Contracts 5,421,702 5,421,702 During the year ended December 31, 2016, there were no transfers between Level I and Level II. The following table summarizes the valuation of CPER’s securities at June 30, 2017 using the fair value hierarchy: At June 30, 2017 Total Level I Level II Level III Short-Term Investments $ 9,823,192 $ 9,823,192 $ $ Exchange-Traded Futures Contracts United States Contracts 385,713 385,713 During the six months ended June 30, 2017, there were no transfers between Level I and Level II. The following table summarizes the valuation of CPER’s securities at December 31, 2016 using the fair value hierarchy: At December 31, 2016 Total Level I Level II Level III Short-Term Investments $ 4,541,320 $ 4,541,320 $ $ Exchange-Traded Futures Contracts United States Contracts 88,575 88,575 During the year ended December 31, 2016, there were no transfers between Level I and Level II. The following table summarizes the valuation of USAG’s securities at June 30, 2017 using the fair value hierarchy: At June 30, 2017 Total Level I Level II Level III Short-Term Investments $ 1,197,553 $ 1,197,553 $ $ Exchange-Traded Futures Contracts Foreign Contracts (34,779) (34,779) United States Contracts 36,957 36,957 During the six months ended June 30, 2017, there were no transfers between Level I and Level II. The following table summarizes the valuation of USAG’s securities at December 31, 2016 using the fair value hierarchy: At December 31, 2016 Total Level I Level II Level III Short-Term Investments $ 1,397,843 $ 1,397,843 $ $ Exchange-Traded Futures Contracts Foreign Contracts (90,442) (90,442) United States Contracts 742 742
Fair Value of Derivative Instruments Held by Usci, Cper, Usag and Usmi	Fair Value of Derivative Instruments Held by USCI Derivatives not Accounted for Condensed Fair Value Fair Value Futures - Commodity Contracts Assets $ (12,350,339) $ 2,055,460 Fair Value of Derivative Instruments Held by CPER Derivatives not Accounted for Condensed Fair Value Fair Value Futures - Commodity Contracts Assets $ 385,713 $ 88,575 Fair Value of Derivative Instruments Held by USAG Derivatives not Accounted for Condensed Fair Value Fair Value Futures - Commodity Contracts Assets $ 2,178 $ (89,700)
Effect of Derivative Instruments on Statements of Operations of Usci, Cper, Usag and Usmi	The Effect of Derivative Instruments on the Condensed Statements of Operations of USCI For the six months ended For the six months ended Derivatives Location of Realized Change in Realized Change in Futures Commodity Contracts Realized gain (loss) on closed contracts $ (6,268,334) $ 15,028,812 Change in unrealized gain (loss) on open contracts $ (14,405,799) $ 20,509,156 The Effect of Derivative Instruments on the Condensed Statements of Operations of CPER For the six months ended For the six months ended Derivatives Location of Realized Change in Realized Change in Futures Commodity Contracts Realized gain (loss) on closed contracts $ 171,775 $ (246,050) Change in unrealized gain (loss) on open contracts $ 297,138 $ 260,863 The Effect of Derivative Instruments on the Condensed Statements of Operations of USAG For the six months ended For the six months ended Derivatives Location of Realized Change in Realized Change in Futures Commodity Contracts Realized gain (loss) on closed contracts $ (121,505) $ 73,847 Change in unrealized gain (loss) on open contracts $ 91,878 $ 83,436

ORGANIZATION AND BUSINESS (Addi

ORGANIZATION AND BUSINESS (Additional Information) (Details)	Jun. 30, 2017$ / Unit	Nov. 15, 2011$ / Unit	Nov. 10, 2010$ / Unit	Aug. 10, 2010$ / unit
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets \| $ / unit				1,000
United States Commodity Index Fund [Member] \| Creation Baskets [Member] \| Effective as of May 1, 2012 [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of Units per basket	50,000
United States Commodity Index Fund [Member] \| Marketing Agent [Member] \| Prior to May 1, 2012 [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of Units per basket	100,000
United States Commodity Index Fund [Member] \| Redemption Baskets [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets	350
United States Commodity Index Fund [Member] \| Redemption Baskets [Member] \| Effective as of May 1, 2012 [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of Units per basket	350
United States Copper Index Fund [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets		1,000	1,000
United States Copper Index Fund [Member] \| Creation Baskets [Member] \| Effective as of May 1, 2012 [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of Units per basket	50,000
United States Copper Index Fund [Member] \| Redemption Baskets [Member] \| Effective as of May 1, 2012 [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets	1,000
United States Copper Index Fund [Member] \| Redemption Baskets [Member] \| Prior to May 1, 2012 [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets	1,000

TRUST SERIES (Additional Inform

TRUST SERIES (Additional Information) (Details)

Sep. 06, 2011

Aug. 10, 2010USD ($)$ / shares$ / unitshares

Nov. 15, 2011USD ($)$ / shares$ / Unitshares

Jul. 30, 2010

Dec. 21, 2009USD ($)shares

Jun. 30, 2017USD ($)$ / shares

Dec. 31, 2016USD ($)$ / shares

Jun. 30, 2016$ / shares

Dec. 31, 2015$ / shares

Apr. 13, 2012$ / shares$ / Unit

Sep. 19, 2011USD ($)

Nov. 10, 2010USD ($)$ / Unit

Capital Unit [Line Items]

Sponsor capital contribution

$ 1,000

$ 0

$ 20

Capital contribution to trust series

$ 1,000

Units acquisition | shares

Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets | $ / unit

1,000

Partner sponsor units description

On November 14, 2011, USCF received 40 Sponsor Shares of CPER in exchange for the previously received capital contribution, representing a beneficial interest in CPER. On December 7, 2011, USCF redeemed the 40 Sponsor Shares of CPER and purchased 40 shares of CPER in the open market. On April 13, 2012, USCF received 40 Sponsor Shares of USAG in exchange for the previously received capital contribution, representing a beneficial interest in USAG. On June 28, 2012, USCF redeemed the 40 Sponsor Shares of USAG and on October 3, 2012, purchased 5 shares of USAG on the open market.

United States Commodity Index Fund [Member]

Capital Unit [Line Items]

Sponsor capital contribution

$ 0

Number of initially registered units on Form S-1 with the U.S. Securities and Exchange Commission

50,000,000

Initial offering price per unit NAV | $ / shares

$ 50

$ 38.46

$ 40.02

$ 43.07

$ 40.52

Number of units issued | shares

100,000

Value of unit issued

$ 5,000,000

Number of registered units

100,000

United States Commodity Index Fund [Member] | Futures Contracts [Member]

Capital Unit [Line Items]

Future contract held

13,543

United States Commodity Index Fund [Member] | Futures Contracts [Member] | NYMEX [Member]

Capital Unit [Line Items]

Future contract held

1,591

United States Commodity Index Fund [Member] | Futures Contracts [Member] | Ice Futures [Member]

Capital Unit [Line Items]

Future contract held

992

United States Commodity Index Fund [Member] | Futures Contracts [Member] | Chicago Board of Trade [Member]

Capital Unit [Line Items]

Future contract held

1,719

United States Commodity Index Fund [Member] | Futures Contracts [Member] | Chicago Mercantile Exchange [Member]

Capital Unit [Line Items]

Future contract held

2,475

United States Commodity Index Fund [Member] | Futures Contracts [Member] | London Metal Exchange [Member]

Capital Unit [Line Items]

Future contract held

5,997

United States Commodity Index Fund [Member] | Futures Contracts [Member] | Commodity Exchange Inc [Member]

Capital Unit [Line Items]

Future contract held

769

United States Agriculture Index Fund [Member]

Capital Unit [Line Items]

Sponsor capital contribution

$ 0

Number of initially registered units on Form S-1 with the U.S. Securities and Exchange Commission

20,000,000

Initial offering price per unit NAV | $ / shares

$ 18.69

$ 19.01

21.33

19.8

$ 25

Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets | $ / Unit

1,000

United States Agriculture Index Fund [Member] | Futures Contracts [Member]

Capital Unit [Line Items]

Future contract held

United States Agriculture Index Fund [Member] | Futures Contracts [Member] | Ice Futures [Member]

Capital Unit [Line Items]

Future contract held

United States Agriculture Index Fund [Member] | Futures Contracts [Member] | Chicago Board of Trade [Member]

Capital Unit [Line Items]

Future contract held

United States Agriculture Index Fund [Member] | Futures Contracts [Member] | Chicago Mercantile Exchange [Member]

Capital Unit [Line Items]

Future contract held

United States Agriculture Index Fund [Member] | Futures Contracts [Member] | Kansas City Board Of Trade [Member]

Capital Unit [Line Items]

Future contract held

United States Metals Index Fund [Member]

Capital Unit [Line Items]

Sponsor capital contribution

$ 3,000

United States Copper Index Fund [Member]

Capital Unit [Line Items]

Sponsor capital contribution

$ 0

Number of initially registered units on Form S-1 with the U.S. Securities and Exchange Commission

30,000,000

Initial offering price per unit NAV | $ / shares

$ 25

$ 17.5

$ 16.36

$ 14.52

$ 14.24

Number of units issued | shares

100,000

Value of unit issued

$ 2,500,000

Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets | $ / Unit

1,000

United States Copper Index Fund [Member] | Futures Contracts [Member] | London Metal Exchange [Member]

Capital Unit [Line Items]

Future contract held

193

FEES PAID BY EACH TRUST SERIE23

FEES PAID BY EACH TRUST SERIES AND RELATED PARTY TRANSACTIONS (Additional Information) (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2017
Fees Paid and Related Party Transactions [Line Items]
Trustee annual fee			$ 3,000
Noninterest Expense Directors Fees	$ 17,699	$ 14,377	35,200	$ 37,599
Expense waiver	$ 11,286	$ 34,311	$ 47,640	$ 65,591
Directors and Officers Liability Insurance [Member] \| Scenario, Forecast [Member]
Fees Paid and Related Party Transactions [Line Items]
Noninterest Expense Directors Fees					$ 539,350
United States Commodity Index Fund [Member]
Fees Paid and Related Party Transactions [Line Items]
Percentage of average daily net assets paid	0.95%		0.95%
United States Commodity Index Fund [Member] \| Scenario, Forecast [Member]
Fees Paid and Related Party Transactions [Line Items]
Noninterest Expense Directors Fees					71,700
Estimated investor tax reporting cost					600,000
United States Commodity Index Fund [Member] \| Effective January 1, 2016 [Member]
Fees Paid and Related Party Transactions [Line Items]
Percentage of average daily net assets paid	0.80%		0.80%
United States Copper Index Fund [Member]
Fees Paid and Related Party Transactions [Line Items]
Costs and expenses annual limit for reimbursement			0.15%
Expense waiver			$ 25,086
United States Copper Index Fund [Member] \| Scenario, Forecast [Member]
Fees Paid and Related Party Transactions [Line Items]
Noninterest Expense Directors Fees					1,500
Estimated investor tax reporting cost					45,000
United States Agriculture Index Fund [Member]
Fees Paid and Related Party Transactions [Line Items]
Expense waiver			$ 22,554
United States Agriculture Index Fund [Member] \| Scenario, Forecast [Member]
Fees Paid and Related Party Transactions [Line Items]
Noninterest Expense Directors Fees					1,500
Estimated investor tax reporting cost					$ 40,000
United States Agriculture Index Fund [Member] \| Effective January 1, 2016 [Member]
Fees Paid and Related Party Transactions [Line Items]
Percentage of average daily net assets paid	0.65%		0.65%

CONTRACTS AND AGREEMENTS (Broke

CONTRACTS AND AGREEMENTS (Brokerage Commission) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Brokerage commissions	$ 154,191	$ 183,853	$ 356,524	$ 361,817
United States Commodity Index Fund [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Brokerage commissions	$ 152,400	$ 183,218	$ 352,006	$ 359,905
Brokerage commissions as a percentage of average daily net assets	0.13%	0.14%	0.13%	0.14%
United States Commodity Index Fund [Member] \| Rebalancing Investments Transaction [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Brokerage commissions			$ 334,029	$ 346,525
Brokerage commissions as a percentage of average daily net assets	94.89%	96.28%	94.89%	96.28%
United States Commodity Index Fund [Member] \| Creation and Redemption Activity [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Brokerage commissions			$ 17,977	$ 13,380
Brokerage commissions as a percentage of average daily net assets	5.11%	3.72%	5.11%	3.72%
United States Copper Index Fund [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Brokerage commissions	$ 1,344	$ 215	$ 3,580	$ 896
Brokerage commissions as a percentage of average daily net assets	0.06%	0.07%	0.06%	0.07%
United States Copper Index Fund [Member] \| Rebalancing Investments Transaction [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Brokerage commissions			$ 2,900	$ 800
Brokerage commissions as a percentage of average daily net assets	81.01%	89.29%	81.01%	89.29%
United States Copper Index Fund [Member] \| Creation and Redemption Activity [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Brokerage commissions			$ 680	$ 96
Brokerage commissions as a percentage of average daily net assets	18.99%	10.71%	18.99%	10.71%
United States Agriculture Index Fund [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Brokerage commissions	$ 447	$ 420	$ 938	$ 1,016
Brokerage commissions as a percentage of average daily net assets	0.10%	0.10%	0.10%	0.10%
United States Agriculture Index Fund [Member] \| Rebalancing Investments Transaction [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Brokerage commissions			$ 938	$ 1,016
Brokerage commissions as a percentage of average daily net assets	100.00%	100.00%	100.00%	100.00%
United States Agriculture Index Fund [Member] \| Creation and Redemption Activity [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Brokerage commissions			$ 0	$ 0
Brokerage commissions as a percentage of average daily net assets	0.00%	0.00%	0.00%	0.00%

CONTRACTS AND AGREEMENTS (Addit

CONTRACTS AND AGREEMENTS (Additional Information) (Details)	6 Months Ended
CONTRACTS AND AGREEMENTS (Additional Information) (Details)	Jun. 30, 2017USD ($)$ / Unit
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 is 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. For each of CPER and USAG, the fee is equal to the percentage fees paid to USCF minus 0.18%, with that result multiplied by 0.5, minus 0.06% 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 \| $ / Unit	15
Commissions per round-turn trade, including applicable exchange and NFA fees for Futures Contracts and options on Futures Contracts \| $ / Unit	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 \| $ / Unit	7
Commissions per round-turn trade, including applicable exchange and NFA fees for Futures Contracts and options on Futures Contracts \| $ / Unit	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

FINANCIAL INSTRUMENTS, OFF-BA26

FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES (Additional Information) (Details) - USD ($)	Jun. 30, 2017	Dec. 31, 2016
United States Commodity Index Fund [Member]
Carrying Amounts and Fair Values of Financial Instruments or Liabilities [Line Items]
Cash deposits and investments in Treasuries	$ 491,758,955	$ 641,316,546
United States Copper Index Fund [Member]
Carrying Amounts and Fair Values of Financial Instruments or Liabilities [Line Items]
Cash deposits and investments in Treasuries	12,754,788	5,640,820
United States Agriculture Index Fund [Member]
Carrying Amounts and Fair Values of Financial Instruments or Liabilities [Line Items]
Cash deposits and investments in Treasuries	$ 1,868,335	$ 1,989,821

FINANCIAL HIGHLIGHTS (Per Unit

FINANCIAL HIGHLIGHTS (Per Unit Performance Data and Other Supplemental Financial Data) (Details) - $ / shares		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016
United States Commodity Index Fund [Member]
Per Share Operating Performance:
Net asset value, beginning of period (in dollars per share)		$ 40.02	$ 40.52
Total income (loss)		(1.35)	2.77
Net expenses		(0.21)	(0.22)
Net increase (decrease) in net asset value		(1.56)	2.55
Net asset value, end of period (in dollars per share)		$ 38.46	$ 43.07
Total Return		(3.90%)	6.29%
Ratios to Average Net Assets
Total income (loss)		(3.49%)	6.84%
Management fees	[1],[2]	0.80%	0.80%
Total expenses excluding management fees	[1]	0.25%	0.26%
Expenses waived	[1],[2]	0.00%	0.00%
Net expenses excluding management fees	[1]	0.25%	0.26%
Net income (loss)		(4.01%)	6.31%
United States Copper Index Fund [Member]
Per Share Operating Performance:
Net asset value, beginning of period (in dollars per share)		$ 16.36	$ 14.24
Total income (loss)		1.21	0.34
Net expenses		(0.07)	(0.06)
Net increase (decrease) in net asset value		1.14	0.28
Net asset value, end of period (in dollars per share)		$ 17.5	$ 14.52
Total Return		6.97%	1.97%
Ratios to Average Net Assets
Total income (loss)		4.38%	0.75%
Management fees	[1],[3]	0.65%	0.65%
Total expenses excluding management fees	[1]	0.59%	2.89%
Expenses waived	[1],[3],[4]	(0.44%)	(2.74%)
Net expenses excluding management fees	[1]	0.15%	0.15%
Net income (loss)		3.98%	0.35%
United States Agriculture Index Fund [Member]
Per Share Operating Performance:
Net asset value, beginning of period (in dollars per share)		$ 19.01	$ 19.8
Total income (loss)		(0.24)	1.61
Net expenses		(0.08)	(0.08)
Net increase (decrease) in net asset value		(0.32)	1.53
Net asset value, end of period (in dollars per share)		$ 18.69	$ 21.33
Total Return		(1.68%)	7.73%
Ratios to Average Net Assets
Total income (loss)		(1.26%)	8.05%
Management fees	[1],[5]	0.65%	0.65%
Total expenses excluding management fees	[1]	2.53%	3.33%
Expenses waived	[1],[5],[6]	(2.38%)	(3.18%)
Net expenses excluding management fees	[1]	0.15%	0.15%
Net income (loss)		(1.66%)	7.65%

[1]	Annualized.
[2]	Effective January 1, 2016 USCF permanently lowered the management fee to 0.80% (80 basis points) per annum of average daily total net assets for USCI.
[3]	Effective January 1, 2016 USCF permanently lowered the management fee to 0.65% (65 basis points) per annum of average daily total net assets for CPER.
[4]	USCF paid certain expenses on a discretionary basis typically borne by CPER where expenses exceeded 0.15% (15 basis points) of CPER’s NAV, on an annualized basis. USCF has no obligation to continue such payments into subsequent periods.
[5]	Effective January 1, 2016, USCF permanently lowered the management fee to 0.65% (65 basis points) per annum of average daily total net assets for USAG.
[6]	USCF paid certain expenses on a discretionary basis typically borne by USAG where expenses exceeded 0.15% (15 basis points) of USAG’s NAV, on an annualized basis. USCF has no obligation to continue such payments into subsequent periods.

FINANCIAL HIGHLIGHTS (Per Uni28

FINANCIAL HIGHLIGHTS (Per Unit Performance Data and Other Supplemental Financial Data) (Parenthetical) (Details)		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016
Effective January 1, 2016 [Member]
Average Sales Price and Production Costs Per Unit of Production [Line Items]
Percentage of average daily net assets paid monthly, waiver expense		0.15%
United States Copper Index Fund [Member]
Average Sales Price and Production Costs Per Unit of Production [Line Items]
Percentage of average daily net assets paid monthly, waiver expense	[1],[2],[3]	0.44%	2.74%
United States Copper Index Fund [Member] \| Effective January 1, 2016 [Member]
Average Sales Price and Production Costs Per Unit of Production [Line Items]
Percentage of average daily net assets paid monthly, waiver expense		0.80%
United States Agriculture Index Fund [Member]
Average Sales Price and Production Costs Per Unit of Production [Line Items]
Percentage of average daily net assets paid monthly, waiver expense	[1],[4],[5]	2.38%	3.18%
United States Agriculture Index Fund [Member] \| Effective January 1, 2016 [Member]
Average Sales Price and Production Costs Per Unit of Production [Line Items]
Percentage of average daily net assets paid monthly, waiver expense		0.65%
United States Commodity Index Fund [Member]
Average Sales Price and Production Costs Per Unit of Production [Line Items]
Percentage of average daily net assets paid monthly, waiver expense	[1],[6]	0.00%	0.00%
United States Commodity Index Fund [Member] \| Effective January 1, 2016 [Member]
Average Sales Price and Production Costs Per Unit of Production [Line Items]
Percentage of average daily net assets paid monthly, waiver expense		0.65%

[1]	Annualized.
[2]	Effective January 1, 2016 USCF permanently lowered the management fee to 0.65% (65 basis points) per annum of average daily total net assets for CPER.
[3]	USCF paid certain expenses on a discretionary basis typically borne by CPER where expenses exceeded 0.15% (15 basis points) of CPER’s NAV, on an annualized basis. USCF has no obligation to continue such payments into subsequent periods.
[4]	Effective January 1, 2016, USCF permanently lowered the management fee to 0.65% (65 basis points) per annum of average daily total net assets for USAG.
[5]	USCF paid certain expenses on a discretionary basis typically borne by USAG where expenses exceeded 0.15% (15 basis points) of USAG’s NAV, on an annualized basis. USCF has no obligation to continue such payments into subsequent periods.
[6]	Effective January 1, 2016 USCF permanently lowered the management fee to 0.80% (80 basis points) per annum of average daily total net assets for USCI.

FAIR VALUE OF FINANCIAL INSTR29

FAIR VALUE OF FINANCIAL INSTRUMENTS (Valuation of Securities Using Fair Value Hierarchy) (Details) - USD ($)	Jun. 30, 2017	Dec. 31, 2016
United States Commodity Index Fund [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	$ 376,592,713	$ 514,192,445
United States Commodity Index Fund [Member] \| Exchange-Traded Futures Contracts [Member] \| Foreign [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	(12,956,160)	(3,366,242)
United States Commodity Index Fund [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	605,821	5,421,702
United States Commodity Index Fund [Member] \| Fair Value, Inputs, Level 1 [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	376,592,713	514,192,445
United States Commodity Index Fund [Member] \| Fair Value, Inputs, Level 1 [Member] \| Exchange-Traded Futures Contracts [Member] \| Foreign [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	(12,956,160)	(3,366,242)
United States Commodity Index Fund [Member] \| Fair Value, Inputs, Level 1 [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	605,821	5,421,702
United States Commodity Index Fund [Member] \| Fair Value, Inputs, Level 2 [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Commodity Index Fund [Member] \| Fair Value, Inputs, Level 2 [Member] \| Exchange-Traded Futures Contracts [Member] \| Foreign [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Commodity Index Fund [Member] \| Fair Value, Inputs, Level 2 [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Commodity Index Fund [Member] \| Fair Value, Inputs, Level 3 [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Commodity Index Fund [Member] \| Fair Value, Inputs, Level 3 [Member] \| Exchange-Traded Futures Contracts [Member] \| Foreign [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Commodity Index Fund [Member] \| Fair Value, Inputs, Level 3 [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Copper Index Fund [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	9,823,192	4,541,320
United States Copper Index Fund [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	385,713	88,575
United States Copper Index Fund [Member] \| Fair Value, Inputs, Level 1 [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	9,823,192	4,541,320
United States Copper Index Fund [Member] \| Fair Value, Inputs, Level 1 [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	385,713	88,575
United States Copper Index Fund [Member] \| Fair Value, Inputs, Level 2 [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Copper Index Fund [Member] \| Fair Value, Inputs, Level 2 [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Copper Index Fund [Member] \| Fair Value, Inputs, Level 3 [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Copper Index Fund [Member] \| Fair Value, Inputs, Level 3 [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Agriculture Index Fund [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	1,197,553	1,397,843
United States Agriculture Index Fund [Member] \| Exchange-Traded Futures Contracts [Member] \| Foreign [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	(34,779)	(90,442)
United States Agriculture Index Fund [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	36,957	742
United States Agriculture Index Fund [Member] \| Fair Value, Inputs, Level 1 [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	1,197,553	1,397,843
United States Agriculture Index Fund [Member] \| Fair Value, Inputs, Level 1 [Member] \| Exchange-Traded Futures Contracts [Member] \| Foreign [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	(34,779)	(90,442)
United States Agriculture Index Fund [Member] \| Fair Value, Inputs, Level 1 [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	36,957	742
United States Agriculture Index Fund [Member] \| Fair Value, Inputs, Level 2 [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Agriculture Index Fund [Member] \| Fair Value, Inputs, Level 2 [Member] \| Exchange-Traded Futures Contracts [Member] \| Foreign [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Agriculture Index Fund [Member] \| Fair Value, Inputs, Level 2 [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Agriculture Index Fund [Member] \| Fair Value, Inputs, Level 3 [Member] \| Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Agriculture Index Fund [Member] \| Fair Value, Inputs, Level 3 [Member] \| Exchange-Traded Futures Contracts [Member] \| Foreign [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	0	0
United States Agriculture Index Fund [Member] \| Fair Value, Inputs, Level 3 [Member] \| Exchange-Traded Futures Contracts [Member] \| United States [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	$ 0	$ 0

FAIR VALUE OF FINANCIAL INSTR30

FAIR VALUE OF FINANCIAL INSTRUMENTS (Fair Value of Derivative Instrument held by Usci, Cper, Usag and Usmi) (Details) - Commodity Contracts [Member] - Futures [Member] - Assets [Member] - USD ($)	Jun. 30, 2017	Dec. 31, 2016
United States Commodity Index Fund [Member]
Derivatives, Fair Value [Line Items]
Derivatives not Accounted for as Hedging Instruments	$ (12,350,339)	$ 2,055,460
United States Copper Index Fund [Member]
Derivatives, Fair Value [Line Items]
Derivatives not Accounted for as Hedging Instruments	385,713	88,575
United States Agriculture Index Fund [Member]
Derivatives, Fair Value [Line Items]
Derivatives not Accounted for as Hedging Instruments	$ 2,178	$ (89,700)

FAIR VALUE OF FINANCIAL INSTR31

FAIR VALUE OF FINANCIAL INSTRUMENTS (Effect of Derivative Instruments on Statements of Operations of Usci, Cper, Usag and Usmi) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (loss) on Derivatives Recognized in Income	$ 3,478,716	$ 30,280,764	$ (6,218,064)	$ 14,856,609
United States Commodity Index Fund [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (loss) on Derivatives Recognized in Income	3,892,126	30,228,101	(6,268,334)	15,028,812
Change in Unrealized Gain (Loss) on Derivatives Recognized in Income			(14,405,799)	20,509,156
United States Commodity Index Fund [Member] \| Commodity Contracts [Member] \| Futures [Member] \| Realized gain (loss) on closed positions [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (loss) on Derivatives Recognized in Income			(6,268,334)	15,028,812
United States Commodity Index Fund [Member] \| Commodity Contracts [Member] \| Futures [Member] \| Change in unrealized gain (loss) on open positions [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Derivatives Recognized in Income			(14,405,799)	20,509,156
United States Copper Index Fund [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (loss) on Derivatives Recognized in Income	(339,575)	2,826	171,775	(246,050)
Change in Unrealized Gain (Loss) on Derivatives Recognized in Income			297,138	260,863
United States Copper Index Fund [Member] \| Commodity Contracts [Member] \| Futures [Member] \| Realized gain (loss) on closed positions [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (loss) on Derivatives Recognized in Income			171,775	(246,050)
United States Copper Index Fund [Member] \| Commodity Contracts [Member] \| Futures [Member] \| Change in unrealized gain (loss) on open positions [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Derivatives Recognized in Income			297,138	260,863
United States Agriculture Index Fund [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (loss) on Derivatives Recognized in Income	$ (73,835)	$ 49,837	(121,505)	73,847
Change in Unrealized Gain (Loss) on Derivatives Recognized in Income			91,878	83,436
United States Agriculture Index Fund [Member] \| Commodity Contracts [Member] \| Futures [Member] \| Realized gain (loss) on closed positions [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (loss) on Derivatives Recognized in Income			(121,505)	73,847
United States Agriculture Index Fund [Member] \| Commodity Contracts [Member] \| Futures [Member] \| Change in unrealized gain (loss) on open positions [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Derivatives Recognized in Income			$ 91,878	$ 83,436