United States Copper Index Fund (CPER) 10-K 10 Mar 17 2016 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2016	Mar. 07, 2017	Jun. 30, 2016
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY
Entity Registrant Name	United States Commodity Index Funds Trust
Entity Central Index Key	1,479,247
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Public Float			$ 667,875,604
Trading Symbol	USCI
Entity Common Stock, Shares Outstanding		14,650,000
United States Commodity Index Fund [Member]
Document Information [Line Items]
Entity Public Float			662,966,284
Entity Common Stock, Shares Outstanding		13,950,000
United States Copper Index Fund [Member]
Document Information [Line Items]
Entity Public Float			2,899,420
Entity Common Stock, Shares Outstanding		600,000
United States Agriculture Index Fund [Member]
Document Information [Line Items]
Entity Public Float			$ 2,009,900
Entity Common Stock, Shares Outstanding		100,000

Statements of Financial Conditi

Statements of Financial Condition - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Assets
Cash and cash equivalents (Notes 2 and 6)	$ 608,435,196	$ 478,007,269
Equity in trading accounts:
Cash and cash equivalents	40,511,991	56,564,630
Unrealized gain (loss) on open commodity futures contracts	2,054,335	(8,756,695)
Receivable from Sponsor (Note 4)	147,813	115,925
Interest receivable	1,261	1,307
Directors' fees and insurance receivable	0	6,222
ETF transaction fees receivable	350	0
Total assets	651,150,946	525,938,658
Liabilities and Capital
Payable for shares redeemed	6,015,383	0
Management fees payable (Note 4)	450,330	362,871
Professional fees payable	706,759	782,028
Brokerage commissions payable	54,015	42,815
Directors' fees and insurance payable	6,226	64
Total liabilities	7,232,713	1,187,778
Commitments and Contingencies (Notes 4, 5 and 6)
Capital
Sponsor	0	0
Shareholders	643,918,233	524,750,880
Total Capital	643,918,233	524,750,880
Total liabilities and capital	$ 651,150,946	$ 525,938,658
Shares outstanding	16,350,000	13,100,000
United States Commodity Index Fund [Member]
Assets
Cash and cash equivalents (Notes 2 and 6)	$ 601,266,026	$ 474,315,271
Equity in trading accounts:
Cash and cash equivalents	40,050,520	55,991,723
Unrealized gain (loss) on open commodity futures contracts	2,055,460	(8,582,227)
Interest receivable	1,261	1,261
Directors' fees and insurance receivable	0	6,190
ETF transaction fees receivable	350	0
Total assets	643,373,617	521,732,218
Liabilities and Capital
Payable for shares redeemed	6,015,383	0
Management fees payable (Note 4)	445,163	359,544
Professional fees payable	560,068	693,889
Brokerage commissions payable	54,015	42,815
Directors' fees and insurance payable	6,164	0
Total liabilities	7,080,793	1,096,248
Commitments and Contingencies (Notes 4, 5 and 6)
Capital
Sponsor	0	0
Shareholders	636,292,824	520,635,970
Total Capital	636,292,824	520,635,970
Total liabilities and capital	$ 643,373,617	$ 521,732,218
Shares outstanding	15,900,000	12,850,000
Net asset value per share	$ 40.02	$ 40.52
Market value per share	$ 40	$ 40.47
United States Copper Index Fund [Member]
Assets
Cash and cash equivalents (Notes 2 and 6)	$ 5,387,655	$ 1,871,256
Equity in trading accounts:
Cash and cash equivalents	253,165	433,440
Unrealized gain (loss) on open commodity futures contracts	88,575	(180,625)
Receivable from Sponsor (Note 4)	75,640	59,601
Directors' fees and insurance receivable	0	32
Total assets	5,805,035	2,183,704
Liabilities and Capital
Management fees payable (Note 4)	3,038	1,156
Professional fees payable	77,296	47,158
Directors' fees and insurance payable	47	0
Total liabilities	80,381	48,314
Commitments and Contingencies (Notes 4, 5 and 6)
Capital
Sponsor	0	0
Shareholders	5,724,654	2,135,390
Total Capital	5,724,654	2,135,390
Total liabilities and capital	$ 5,805,035	$ 2,183,704
Shares outstanding	350,000	150,000
Net asset value per share	$ 16.36	$ 14.24
Market value per share	$ 16.35	$ 14.27
United States Agriculture Index Fund [Member]
Assets
Cash and cash equivalents (Notes 2 and 6)	$ 1,781,515	$ 1,820,742
Equity in trading accounts:
Cash and cash equivalents	208,306	139,467
Unrealized gain (loss) on open commodity futures contracts	(89,700)	6,157
Receivable from Sponsor (Note 4)	72,173	56,324
Interest receivable	0	46
Total assets	1,972,294	2,022,736
Liabilities and Capital
Management fees payable (Note 4)	2,129	2,171
Professional fees payable	69,395	40,981
Directors' fees and insurance payable	15	64
Total liabilities	71,539	43,216
Commitments and Contingencies (Notes 4, 5 and 6)
Capital
Sponsor	0	0
Shareholders	1,900,755	1,979,520
Total Capital	1,900,755	1,979,520
Total liabilities and capital	$ 1,972,294	$ 2,022,736
Shares outstanding	100,000	100,000
Net asset value per share	$ 19.01	$ 19.80
Market value per share	$ 18.07	$ 19.39

Schedule of Investments

Schedule of Investments		Dec. 31, 2016USD ($)Contract		Dec. 31, 2015USD ($)Contract
United States Commodity Index Fund [Member]
Number of Contracts | Contract		21,901	[1]	18,245	[2]
Unrealized Gain (Loss) on Open Commodity Contracts		$ 2,055,460	[1]	$ (8,582,227)	[2]
% of Capital		0.32%	[1]	(1.65%)	[2]
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member]
Number of Contracts | Contract		11,666		8,766
Unrealized Gain (Loss) on Open Commodity Contracts		$ (3,624,908)		$ (9,258,176)
% of Capital		(0.57%)		(1.78%)
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | LME Aluminum Futures LA January 2017 contracts, expiring January 2017 [Member]
Number of Contracts | Contract		1,106
Unrealized Gain (Loss) on Open Commodity Contracts		$ (1,172,206)
% of Capital		(0.19%)
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | LME Tin Futures LT January 2017 contracts, expiring January 2017 [Member]
Number of Contracts | Contract		611
Unrealized Gain (Loss) on Open Commodity Contracts		$ 12,573,896
% of Capital		1.98%
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | LME Aluminum Futures LA February 2017 contracts, expiring February 2017 [Member]
Number of Contracts | Contract		1,067
Unrealized Gain (Loss) on Open Commodity Contracts		$ (80,638)
% of Capital		(0.01%)
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | LME Tin Futures LT February 2017 contracts, expiring February 2017 [Member]
Number of Contracts | Contract		434
Unrealized Gain (Loss) on Open Commodity Contracts		$ 305,433
% of Capital		0.05%
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-US Cocoa Futures CC March 2017 contracts, expiring March 2017 [Member]
Number of Contracts | Contract		2,030
Unrealized Gain (Loss) on Open Commodity Contracts		$ (11,784,830)
% of Capital		(1.85%)
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | LME Zinc Futures LX April 2017 contracts, expiring April 2017 [Member]
Number of Contracts | Contract		883
Unrealized Gain (Loss) on Open Commodity Contracts		$ 5,474,631
% of Capital		0.86%
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-US Sugar #11 Futures SB May 2017 contracts, expiring April 2017 [Member]
Number of Contracts | Contract		2,216
Unrealized Gain (Loss) on Open Commodity Contracts		$ (2,386,821)
% of Capital		(0.38%)
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | LME Lead Futures LL May 2017 contracts, expiring May 2017 [Member]
Number of Contracts | Contract		978
Unrealized Gain (Loss) on Open Commodity Contracts		$ (769,450)
% of Capital		(0.12%)
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		$ (5,868,193)
% of Capital		(0.92%)
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE Brent Crude Oil Futures CO December 2017 contracts, expiring October 2017 [Member]
Number of Contracts | Contract		777
Unrealized Gain (Loss) on Open Commodity Contracts		$ 90,120
% of Capital		0.01%
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-US Gas Oil Futures QS December 2017 contracts, expiring December 2017 [Member]
Number of Contracts | Contract		869
Unrealized Gain (Loss) on Open Commodity Contracts		$ (6,850)
% of Capital	[3]	0.00%
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | LME Lead Futures LL January 2016 contracts, expiring January 2016 [Member]
Number of Contracts | Contract				879
Unrealized Gain (Loss) on Open Commodity Contracts				$ (3,401,194)
% of Capital				(0.65%)
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | LME Tin Futures LT February 2016 contracts, expiring February 2016 [Member]
Number of Contracts | Contract				536
Unrealized Gain (Loss) on Open Commodity Contracts				$ (635,560)
% of Capital				(0.12%)
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | LME Zinc Futures LX February 2016 contracts, expiring February 2016 [Member]
Number of Contracts | Contract				774
Unrealized Gain (Loss) on Open Commodity Contracts				$ (8,298,363)
% of Capital				(1.60%)
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-US Cotton #2 Futures CT March 2016 contracts, expiring March 2016 [Member]
Number of Contracts | Contract				1,166
Unrealized Gain (Loss) on Open Commodity Contracts				$ 457,450
% of Capital				0.09%
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | LME Aluminum Futures LA March 2016 contracts, expiring March 2016 [Member]
Number of Contracts | Contract				971
Unrealized Gain (Loss) on Open Commodity Contracts				$ (475,970)
% of Capital				(0.09%)
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-US Sugar #11 Futures SB May 2016 contracts, expiring April 2016 [Member]
Number of Contracts | Contract				2,313
Unrealized Gain (Loss) on Open Commodity Contracts				$ 1,703,218
% of Capital				0.33%
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | LME Lead Futures LL May 2016 contracts, expiring May 2016 [Member]
Number of Contracts | Contract				956
Unrealized Gain (Loss) on Open Commodity Contracts				$ 1,585,563
% of Capital				0.30%
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-US Cocoa Futures CC July 2016 contracts, expiring July 2016 [Member]
Number of Contracts | Contract				1,171
Unrealized Gain (Loss) on Open Commodity Contracts				$ (193,320)
% of Capital				(0.04%)
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member]
Number of Contracts | Contract		6,665		7,706
Unrealized Gain (Loss) on Open Commodity Contracts		$ 5,421,702		$ (4,562,015)
% of Capital		0.85%		(0.88%)
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CBOT Soybean Oil Futures BO March 2017 contracts, expiring March 2017 [Member]
Number of Contracts | Contract		2,138
Unrealized Gain (Loss) on Open Commodity Contracts		$ 1,593,960
% of Capital		0.25%
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | COMEX Copper Futures HG March 2017 contracts, expiring March 2017 [Member]
Number of Contracts | Contract		722
Unrealized Gain (Loss) on Open Commodity Contracts		$ (2,564,963)
% of Capital		(0.40%)
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CME Feeder Cattle Futures FC March 2017 contracts, expiring March 2017 [Member]
Number of Contracts | Contract		721
Unrealized Gain (Loss) on Open Commodity Contracts		$ 569,113
% of Capital		0.09%
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | COMEX Gold Futures GC April 2017 contracts, expiring April 2017 [Member]
Number of Contracts | Contract		398
Unrealized Gain (Loss) on Open Commodity Contracts		$ 127,560
% of Capital		0.02%
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | NYMEX Natural Gas Futures NG October 2017 contracts, expiring September 2017 [Member]
Number of Contracts | Contract		1,283
Unrealized Gain (Loss) on Open Commodity Contracts		$ 5,532,650
% of Capital		0.87%
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | NYMEX WTI Crude Oil Futures CL December 2017 contracts, expiring November 2017 [Member]
Number of Contracts | Contract		798
Unrealized Gain (Loss) on Open Commodity Contracts		$ 33,140
% of Capital	[3]	0.00%
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | NYMEX Heating Oil Futures HO December 2017 contracts, expiring November 2017 [Member]
Number of Contracts | Contract		605
Unrealized Gain (Loss) on Open Commodity Contracts		$ 130,242
% of Capital		0.02%
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CBOT Corn Futures C March 2016 contracts, expiring March 2016 [Member]
Number of Contracts | Contract				2,067
Unrealized Gain (Loss) on Open Commodity Contracts				$ (3,314,538)
% of Capital				(0.64%)
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CBOT Soybean Futures S March 2016 contracts, expiring March 2016 [Member]
Number of Contracts | Contract				866
Unrealized Gain (Loss) on Open Commodity Contracts				$ (1,157,925)
% of Capital				(0.22%)
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CME Feeder Cattle Futures LC March 2016 contracts, expiring March 2016 [Member]
Number of Contracts | Contract				469
Unrealized Gain (Loss) on Open Commodity Contracts				$ 690,863
% of Capital				0.13%
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | COMEX Silver Futures SI March 2016 contracts, expiring March 2016 [Member]
Number of Contracts | Contract				537
Unrealized Gain (Loss) on Open Commodity Contracts				$ (4,878,265)
% of Capital				(0.94%)
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CME Live Cattle Futures LC April 2016 contracts, expiring April 2016 [Member]
Number of Contracts | Contract				679
Unrealized Gain (Loss) on Open Commodity Contracts				$ 1,255,707
% of Capital				0.24%
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | COMEX Gold Futures GC April 2016 contracts, expiring April 2016 [Member]
Number of Contracts | Contract				349
Unrealized Gain (Loss) on Open Commodity Contracts				$ (136,540)
% of Capital				(0.02%)
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CBOT Soybean Oil Futures BO July 2016, expiring July 2016 [Member]
Number of Contracts | Contract				2,016
Unrealized Gain (Loss) on Open Commodity Contracts				$ 2,713,860
% of Capital				0.52%
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | NYMEX RBOB Gasoline Futures RB December 2016, expiring November 2016 [Member]
Number of Contracts | Contract				723
Unrealized Gain (Loss) on Open Commodity Contracts				$ 264,823
% of Capital				0.05%
United States Commodity Index Fund [Member] | Open Futures Contracts Short [Member] | Foreign [Member]
Number of Contracts | Contract	[4]	3,570		1,773
Unrealized Gain (Loss) on Open Commodity Contracts	[4]	$ 258,666		$ 5,237,964
% of Capital	[4]	0.04%		1.01%
United States Commodity Index Fund [Member] | Open Futures Contracts Short [Member] | Foreign [Member] | LME Aluminum Futures LA January 2017 contracts, expiring January 2017 [Member]
Number of Contracts | Contract	[4]	1,106
Unrealized Gain (Loss) on Open Commodity Contracts	[4]	$ 65,634
% of Capital	[4]	0.01%
United States Commodity Index Fund [Member] | Open Futures Contracts Short [Member] | Foreign [Member] | LME Tin Futures LT January 2017 contracts, expiring January 2017 [Member]
Number of Contracts | Contract	[4]	611
Unrealized Gain (Loss) on Open Commodity Contracts	[4]	$ (1,864,792)
% of Capital	[4]	(0.29%)
United States Commodity Index Fund [Member] | Open Futures Contracts Short [Member] | Foreign [Member] | LME Zinc Futures LX April 2017 contracts, expiring April 2017 [Member]
Number of Contracts | Contract	[4]	180
Unrealized Gain (Loss) on Open Commodity Contracts	[4]	$ 421,463
% of Capital	[4]	0.07%
United States Commodity Index Fund [Member] | Open Futures Contracts Short [Member] | Foreign [Member] | LME Lead Futures LL May 2017 contracts, expiring May 2017 [Member]
Number of Contracts | Contract	[4]	978
Unrealized Gain (Loss) on Open Commodity Contracts	[4]	$ 1,281,082
% of Capital	[4]	0.20%
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	[4]	695
Unrealized Gain (Loss) on Open Commodity Contracts	[4]	$ 355,279
% of Capital	[4]	0.05%
United States Commodity Index Fund [Member] | Open Futures Contracts Short [Member] | Foreign [Member] | LME Lead Futures LL January 2016 contracts, expiring January 2016 [Member]
Number of Contracts | Contract	[4]			879
Unrealized Gain (Loss) on Open Commodity Contracts	[4]			$ (1,603,795)
% of Capital	[4]			(0.30%)
United States Commodity Index Fund [Member] | Open Futures Contracts Short [Member] | Foreign [Member] | LME Tin Futures LT February 2016 contracts, expiring February 2016 [Member]
Number of Contracts | Contract	[4]			26
Unrealized Gain (Loss) on Open Commodity Contracts	[4]			$ 4,504
% of Capital	[3],[4]			0.00%
United States Commodity Index Fund [Member] | Open Futures Contracts Short [Member] | Foreign [Member] | LME Zinc Futures LX February 2016 contracts, expiring February 2016 [Member]
Number of Contracts | Contract	[4]			774
Unrealized Gain (Loss) on Open Commodity Contracts	[4]			$ 6,931,598
% of Capital	[4]			1.33%
United States Commodity Index Fund [Member] | Open Futures Contracts Short [Member] | Foreign [Member] | LME Lead Futures LL May 2016 contracts, expiring May 2016 [Member]
Number of Contracts | Contract	[4]			94
Unrealized Gain (Loss) on Open Commodity Contracts	[4]			$ (94,343)
% of Capital	[4]			(0.02%)
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member]
Market Value		$ 514,192,445		$ 299,704,608
% of Capital		80.81%		57.57%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.34%, 1/05/2017 [Member]
Principal Amount		$ 40,000,000
Market Value		$ 39,998,489
% of Capital		6.29%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.38%, 1/12/2017 [Member]
Principal Amount		$ 30,000,000
Market Value		$ 29,996,517
% of Capital		4.72%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.43%, 1/19/2017 [Member]
Principal Amount		$ 20,000,000
Market Value		$ 19,995,750
% of Capital		3.14%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.36%, 1/26/2017 [Member]
Principal Amount		$ 20,000,000
Market Value		$ 19,995,000
% of Capital		3.14%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.45%, 2/16/2017 [Member]
Principal Amount		$ 20,000,000
Market Value		$ 19,988,500
% of Capital		3.14%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.45%, 3/02/2017 [Member]
Principal Amount		$ 20,000,000
Market Value		$ 19,985,000
% of Capital		3.14%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.47%, 3/09/2017 [Member]
Principal Amount		$ 20,000,000
Market Value		$ 19,982,505
% of Capital		3.14%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.43%, 3/30/2017 [Member]
Principal Amount		$ 20,000,000
Market Value		$ 19,978,978
% of Capital		3.14%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.47%, 4/13/2017 [Member]
Principal Amount		$ 20,000,000
Market Value		$ 19,973,367
% of Capital		3.14%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.46%, 4/20/2017 [Member]
Principal Amount		$ 20,000,000
Market Value		$ 19,972,447
% of Capital		3.14%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.47%, 4/27/2017 [Member]
Principal Amount		$ 35,000,000
Market Value		$ 34,947,558
% of Capital		5.49%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.49%, 5/04/2017 [Member]
Principal Amount		$ 35,000,000
Market Value		$ 34,941,105
% of Capital		5.49%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.55%, 5/11/2017 [Member]
Principal Amount		$ 25,000,000
Market Value		$ 24,950,799
% of Capital		3.92%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.60%, 5/18/2017 [Member]
Principal Amount		$ 30,000,000
Market Value		$ 29,932,071
% of Capital		4.70%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.61%, 5/25/2017 [Member]
Principal Amount		$ 30,000,000
Market Value		$ 29,927,100
% of Capital		4.70%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.60%, 6/01/2017 [Member]
Principal Amount		$ 10,000,000
Market Value		$ 9,975,043
% of Capital		1.57%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.62%, 6/08/2017 [Member]
Principal Amount		$ 40,000,000
Market Value		$ 39,892,033
% of Capital		6.27%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.65%, 6/15/2017 [Member]
Principal Amount		$ 40,000,000
Market Value		$ 39,881,750
% of Capital		6.27%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.64%, 6/22/2017 [Member]
Principal Amount		$ 30,000,000
Market Value		$ 29,908,266
% of Capital		4.70%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.60%, 6/29/2017 [Member]
Principal Amount		$ 10,000,000
Market Value		$ 9,970,167
% of Capital		1.57%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.10%, 1/14/2016 [Member]
Principal Amount				$ 30,000,000
Market Value				$ 29,998,917
% of Capital				5.76%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.23%, 3/03/2016 [Member]
Principal Amount				$ 60,000,000
Market Value				$ 59,976,233
% of Capital				11.52%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.26%, 3/31/2016 [Member]
Principal Amount				$ 60,000,000
Market Value				$ 59,961,750
% of Capital				11.52%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.26%, 5/05/2016 [Member]
Principal Amount				$ 30,000,000
Market Value				$ 29,972,917
% of Capital				5.76%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.33%, 5/12/2016 [Member]
Principal Amount				$ 40,000,000
Market Value				$ 39,951,233
% of Capital				7.67%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.35%, 5/26/2016 [Member]
Principal Amount				$ 30,000,000
Market Value				$ 29,958,025
% of Capital				5.76%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.53%, 6/09/2016 [Member]
Principal Amount				$ 30,000,000
Market Value				$ 29,930,000
% of Capital				5.75%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.46%, 6/23/2016 [Member]
Principal Amount				$ 20,000,000
Market Value				$ 19,955,533
% of Capital				3.83%
United States Copper Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member]
Number of Contracts | Contract	[5]	92
Unrealized Gain (Loss) on Open Commodity Contracts	[5]	$ 88,575
% of Capital	[5]	1.55%
United States Copper Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | COMEX Copper Futures HG March 2017 contracts, expiring March 2017 [Member]
Number of Contracts | Contract		46
Unrealized Gain (Loss) on Open Commodity Contracts		$ 276,338
% of Capital		4.83%
United States Copper Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | COMEX Copper Futures HG May 2017 contracts, expiring May 2017 [Member]
Number of Contracts | Contract		46
Unrealized Gain (Loss) on Open Commodity Contracts		$ (187,763)
% of Capital		(3.28%)
United States Copper Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | COMEX Copper Futures HG March 2016 contracts, expiring March 2016 [Member]
Number of Contracts | Contract	[6]			40
Unrealized Gain (Loss) on Open Commodity Contracts	[6]			$ (180,625)
% of Capital	[6]			(8.46%)
United States Copper Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member]
Market Value		$ 4,541,320		$ 998,899
% of Capital		79.33%		46.78%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.34%, 1/05/2017 [Member]
Principal Amount		$ 250,000
Market Value		$ 249,990
% of Capital		4.37%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S .Treasury Bills 0.44%, 1/26/2017 [Member]
Principal Amount		$ 150,000
Market Value		$ 149,955
% of Capital		2.62%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S .Treasury Bills 0.46%, 2/16/2017 [Member]
Principal Amount		$ 150,000
Market Value		$ 149,913
% of Capital		2.62%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S .Treasury Bills 0.48%, 3/09/2017 [Member]
Principal Amount		$ 150,000
Market Value		$ 149,866
% of Capital		2.62%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S .Treasury Bills 0.46%, 4/06/2017 [Member]
Principal Amount		$ 250,000
Market Value		$ 249,700
% of Capital		4.36%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.47%, 4/13/2017 [Member]
Principal Amount		$ 250,000
Market Value		$ 249,667
% of Capital		4.36%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.46%, 4/20/2017 [Member]
Principal Amount		$ 250,000
Market Value		$ 249,656
% of Capital		4.36%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.47%, 4/27/2017 [Member]
Principal Amount		$ 400,000
Market Value		$ 399,401
% of Capital		6.98%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.49%, 5/04/2017 [Member]
Principal Amount		$ 350,000
Market Value		$ 349,411
% of Capital		6.10%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.55%, 5/11/2017 [Member]
Principal Amount		$ 300,000
Market Value		$ 299,410
% of Capital		5.23%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.60%, 5/18/2017 [Member]
Principal Amount		$ 350,000
Market Value		$ 349,207
% of Capital		6.10%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.60%, 6/01/2017 [Member]
Principal Amount		$ 200,000
Market Value		$ 199,501
% of Capital		3.48%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.62%, 6/08/2017 [Member]
Principal Amount		$ 500,000
Market Value		$ 498,650
% of Capital		8.71%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.65%, 6/15/2017 [Member]
Principal Amount		$ 500,000
Market Value		$ 498,522
% of Capital		8.71%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.64%, 6/22/2017 [Member]
Principal Amount		$ 500,000
Market Value		$ 498,471
% of Capital		8.71%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.20%, 4/28/2016 [Member]
Principal Amount				$ 500,000
Market Value				$ 499,681
% of Capital				23.40%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.26%, 5/05/2016 [Member]
Principal Amount				$ 250,000
Market Value				$ 249,774
% of Capital				11.70%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.46%, 6/23/2016 [Member]
Principal Amount				$ 250,000
Market Value				$ 249,444
% of Capital				11.68%
United States Agriculture Index Fund [Member]
Number of Contracts | Contract		68	[3]	75	[7]
Unrealized Gain (Loss) on Open Commodity Contracts		$ (89,700)	[3]	$ 6,157	[7]
% of Capital		(4.72%)	[3]	0.31%	[7]
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member]
Number of Contracts | Contract		29		31
Unrealized Gain (Loss) on Open Commodity Contracts		$ (90,442)		$ 48,270
% of Capital		(4.76%)		2.44%
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-US Cotton #2 Futures CT March 2017 contracts, expiring March 2017 [Member]
Number of Contracts | Contract		4
Unrealized Gain (Loss) on Open Commodity Contracts		$ 915
% of Capital		0.05%
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-Canola Futures RS March 2017 contracts, expiring March 2017 [Member]
Number of Contracts | Contract		3
Unrealized Gain (Loss) on Open Commodity Contracts		$ 63
% of Capital	[3]	0.00%
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-US Cocoa Futures CC March 2017 contracts, expiring March 2017 [Member]
Number of Contracts | Contract		7
Unrealized Gain (Loss) on Open Commodity Contracts		$ (33,980)
% of Capital		(1.79%)
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-US Sugar #11 Futures SB May 2017 contracts, expiring April 2017 [Member]
Number of Contracts | Contract		11
Unrealized Gain (Loss) on Open Commodity Contracts		$ (14,090)
% of Capital		(0.74%)
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-US Coffee-C Futures KC July 2017 contracts, expiring July 2017 [Member]
Number of Contracts | Contract		4
Unrealized Gain (Loss) on Open Commodity Contracts		$ (43,350)
% of Capital		(2.28%)
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-US Cotton #2 Futures CT March 2016 contracts, expiring March 2016 [Member]
Number of Contracts | Contract				5
Unrealized Gain (Loss) on Open Commodity Contracts				$ 2,170
% of Capital				0.11%
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-Canola Futures RS March 2016 contracts, expiring March 2016 [Member]
Number of Contracts | Contract				3
Unrealized Gain (Loss) on Open Commodity Contracts				$ 279
% of Capital				0.01%
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-US Sugar #11 Futures SB May 2016 contracts, expiring April 2016 [Member]
Number of Contracts | Contract				15
Unrealized Gain (Loss) on Open Commodity Contracts				$ 42,347
% of Capital				2.14%
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-US Cocoa Futures CC July 2016 contracts, expiring July 2016 [Member]
Number of Contracts | Contract				5
Unrealized Gain (Loss) on Open Commodity Contracts				$ (220)
% of Capital				(0.01%)
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-US Coffee-C Futures KC July 2016 contracts, expiring July 2016 [Member]
Number of Contracts | Contract				3
Unrealized Gain (Loss) on Open Commodity Contracts				$ 3,694
% of Capital				0.19%
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member]
Number of Contracts | Contract		39		44
Unrealized Gain (Loss) on Open Commodity Contracts		$ 742		$ (42,113)
% of Capital		0.04%		(2.13%)
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CBOT Soybean Oil Futures BO March 2017 contracts, expiring March 2017 [Member]
Number of Contracts | Contract		4
Unrealized Gain (Loss) on Open Commodity Contracts		$ 3,300
% of Capital		0.17%
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CBOT Wheat Futures W March 2017 contracts, expiring March 2017 [Member]
Number of Contracts | Contract		6
Unrealized Gain (Loss) on Open Commodity Contracts		$ (11,988)
% of Capital		(0.63%)
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CME Feeder Cattle Futures FC March 2017 contracts, expiring March 2017 [Member]
Number of Contracts | Contract		2
Unrealized Gain (Loss) on Open Commodity Contracts		$ 1,038
% of Capital		0.06%
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CME Lean Hogs Futures LH April 2017 contracts, expiring April 2017 [Member]
Number of Contracts | Contract		3
Unrealized Gain (Loss) on Open Commodity Contracts		$ 6,790
% of Capital		0.36%
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CME Live Cattle Futures LC April 2017 contracts, expiring April 2017 [Member]
Number of Contracts | Contract		3
Unrealized Gain (Loss) on Open Commodity Contracts		$ 4,510
% of Capital		0.24%
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | KCBT Hard Red Winter Wheat Futures KW May 2017 contracts, expiring May 2017 [Member]
Number of Contracts | Contract		2
Unrealized Gain (Loss) on Open Commodity Contracts		$ (300)
% of Capital		(0.02%)
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CBOT Soybean Meal Futures SM July 2017 contracts, expiring July 2017 [Member]
Number of Contracts | Contract		5
Unrealized Gain (Loss) on Open Commodity Contracts		$ (2,270)
% of Capital		(0.12%)
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		$ 1,412
% of Capital		0.07%
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		$ (1,750)
% of Capital		(0.09%)
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CME Lean Hogs Futures LH February 2016 contracts, expiring February 2016 [Member]
Number of Contracts | Contract				3
Unrealized Gain (Loss) on Open Commodity Contracts				$ 2,453
% of Capital				0.12%
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CME Live Cattle Futures LC February 2016 contracts, expiring February 2016 [Member]
Number of Contracts | Contract				3
Unrealized Gain (Loss) on Open Commodity Contracts				$ (1,740)
% of Capital				(0.09%)
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CBOT Soybean Futures S March 2016 contracts, expiring March 2016 [Member]
Number of Contracts | Contract				7
Unrealized Gain (Loss) on Open Commodity Contracts				$ (8,138)
% of Capital				(0.41%)
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CBOT Soybean Meal Futures SM March 2016 contracts, expiring March 2016 [Member]
Number of Contracts | Contract				3
Unrealized Gain (Loss) on Open Commodity Contracts				$ (6,310)
% of Capital				(0.32%)
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CBOT Wheat Futures W March 2016 contracts, expiring March 2016 [Member]
Number of Contracts | Contract				5
Unrealized Gain (Loss) on Open Commodity Contracts				$ (10,725)
% of Capital				(0.54%)
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CME Feeder Cattle Futures LC March 2016 contracts, expiring March 2016 [Member]
Number of Contracts | Contract				1
Unrealized Gain (Loss) on Open Commodity Contracts				$ 2,788
% of Capital				0.14%
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | KCBT Hard Red Winter Wheat Futures KW May 2016 contracts, expiring May 2016 [Member]
Number of Contracts | Contract				2
Unrealized Gain (Loss) on Open Commodity Contracts				$ (3,875)
% of Capital				(0.20%)
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CBOT Soybean Oil Futures BO July 2016, expiring July 2016 [Member]
Number of Contracts | Contract				5
Unrealized Gain (Loss) on Open Commodity Contracts				$ 1,284
% of Capital				0.07%
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CBOT Corn Futures C September 2016 contracts, expiring September 2016 [Member]
Number of Contracts | Contract				15
Unrealized Gain (Loss) on Open Commodity Contracts				$ (17,850)
% of Capital				(0.90%)
United States Agriculture Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member]
Market Value		$ 1,397,843		$ 749,059
% of Capital		73.54%		37.84%
United States Agriculture Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.34%, 1/05/2017 [Member]
Principal Amount		$ 250,000
Market Value		$ 249,991
% of Capital		13.15%
United States Agriculture Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.45%, 2/16/2017 [Member]
Principal Amount		$ 250,000
Market Value		$ 249,856
% of Capital		13.15%
United States Agriculture Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.49%, 5/04/2017 [Member]
Principal Amount		$ 400,000
Market Value		$ 399,327
% of Capital		21.01%
United States Agriculture Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.60%, 5/18/2017 [Member]
Principal Amount		$ 250,000
Market Value		$ 249,434
% of Capital		13.12%
United States Agriculture Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.64%, 6/22/2017 [Member]
Principal Amount		$ 250,000
Market Value		$ 249,235
% of Capital		13.11%
United States Agriculture Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.20%, 4/28/2016 [Member]
Principal Amount				$ 250,000
Market Value				$ 249,840
% of Capital				12.62%
United States Agriculture Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.26%, 5/05/2016 [Member]
Principal Amount				$ 250,000
Market Value				$ 249,775
% of Capital				12.62%
United States Agriculture Index Fund [Member] | Cash Equivalents [Member] | US Treasury Securities [Member] | U.S. Treasury Bills 0.46%, 6/23/2016 [Member]
Principal Amount				$ 250,000
Market Value				$ 249,444
% of Capital				12.60%
[1]	Collateral amounted to $40,050,520 on open futures contracts.
[2]	Collateral amounted to $55,991,723 on open futures contracts.
[3]	Represents less than 0.005%.
[4]	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).
[5]	Collateral amounted to $253,165 on open futures contracts.
[6]	Collateral amounted to $433,440 on open futures contracts.
[7]	Collateral amounted to $139,467 on open futures contracts.

Schedule of Investments (Parent

Schedule of Investments (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
United States Commodity Index Fund [Member]
Debt Instrument, Collateral Amount	$ 40,050,520	$ 55,991,723
Interest rate	0.005%	0.005%
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | LME Tin Futures LT January 2017 contracts, expiring January 2017 [Member]
Expiration date	January 2,017
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-US Cocoa Futures CC March 2017 contracts, expiring March 2017 [Member]
Expiration date	March 2,017
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | LME Zinc Futures LX April 2017 contracts, expiring April 2017 [Member]
Expiration date	April 2,017
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-US Sugar 11 Futures SB May 2017 contracts, expiring April 2017 [Member]
Expiration date	April 2,017
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | LME Lead Futures LL May 2017 contracts, expiring May 2017 [Member]
Expiration date	May 2,017
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | Lme Aluminum Futures La January 2017 Contracts, Expiring January 2017 [Member]
Expiration date	January 2,017
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | Lme Aluminum Futures La February 2017 Contracts, Expiring February 2017 [Member]
Expiration date	February 2,017
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | Lme Tin Futures Lt February 2017 Contracts, Expiring February 2017 [Member]
Expiration date	February 2,017
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] | Ice Brent Crude Oil Futures Co December 2017 Contracts, Expiring October 2017 [Member]
Expiration date	October 2,017
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | Ice Us Gas Oil Futures Qs 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 Lead Futures Ll January 2016 Contracts, Expiring January 2016 [Member]
Expiration date		January 2,016
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | Lme Tin Futures Lt February 2016 Contracts, Expiring February 2016 [Member]
Expiration date		February 2,016
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | Lme Zinc Futures Lx February 2016 Contracts, Expiring February 2016 [Member]
Expiration date		February 2,016
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | Ice-Us Cotton 2 Futures Ct March 2016 Contracts, Expiring March 2016 [Member]
Expiration date		March 2,016
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | Lme Aluminum Futures La March 2016 Contracts, Expiring March 2016 [Member]
Expiration date		March 2,016
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | Ice-Us Sugar 11 Futures Sb May 2016 Contracts, Expiring April 2016 [Member]
Expiration date		April 2,016
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | Lme Lead Futures Ll May 2016 Contracts, Expiring May 2016 [Member]
Expiration date		May 2,016
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | Ice-Us Cocoa Futures Cc July 2016 Contracts, Expiring July 2016 [Member]
Expiration date		July 2,016
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CME Feeder Cattle Futures FC March 2017 contracts, expiring March 2017 [Member]
Expiration date	March 2,017
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CBOT Soybean Oil Futures BO March 2017 contracts, expiring March 2017 [Member]
Expiration date	March 2,017
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | COMEX Copper Futures HG March 2017 contracts, expiring March 2017 [Member]
Expiration date	March 2,017
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | Comex Gold Futures Gc April 2017 Contracts, Expiring April 2017 [Member]
Expiration date	April 2,017
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | Nymex Natural Gas Futures Ng 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] | Nymex Wti Crude Oil Futures Cl December 2017 Contracts, Expiring November 2017 [Member]
Expiration date	November 2,017
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | Nymex Heating Oil Futures Ho December 2017 Contracts, Expiring November 2017 [Member]
Expiration date	November 2,017
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | Cbot Corn Futures C March 2016 Contracts, Expiring March 2016 [Member]
Expiration date		March 2,016
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | Cbot Soybean Futures S March 2016 Contracts, Expiring March 2016 [Member]
Expiration date		March 2,016
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | Cme Feeder Cattle Futures Lc March 2016 Contracts, Expiring March 2016 [Member]
Expiration date		March 2,016
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | Comex Silver Futures Si March 2016 Contracts, Expiring March 2016 [Member]
Expiration date		March 2,016
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | Cme Live Cattle Futures Lc April 2016 Contracts, Expiring April 2016 [Member]
Expiration date		April 2,016
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | Comex Gold Futures Gc April 2016 Contracts, Expiring April 2016 [Member]
Expiration date		April 2,016
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | Cbot Soybean Oil Futures Bo July 2016, Expiring July 2016 [Member]
Expiration date		July 2,016
United States Commodity Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | Nymex Rbob Gasoline Futures Rb December 2016, Expiring November 2016 [Member]
Expiration date		November 2,016
United States Commodity Index Fund [Member] | Open Futures Contracts Short [Member] | Foreign [Member] | LME Tin Futures LT January 2017 contracts, expiring January 2017 [Member]
Expiration date	January 2,017
United States Commodity Index Fund [Member] | Open Futures Contracts Short [Member] | Foreign [Member] | LME Zinc Futures LX April 2017 contracts, expiring April 2017 [Member]
Expiration date	April 2,017
United States Commodity Index Fund [Member] | Open Futures Contracts Short [Member] | Foreign [Member] | LME Lead Futures LL May 2017 contracts, expiring May 2017 [Member]
Expiration date	May 2,017
United States Commodity Index Fund [Member] | Open Futures Contracts Short [Member] | Foreign [Member] | Lme Aluminum Futures La January 2017 Contracts, Expiring January 2017 [Member]
Expiration date	January 2,017
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 January 2016 Contracts, Expiring January 2016 [Member]
Expiration date		January 2,016
United States Commodity Index Fund [Member] | Open Futures Contracts Short [Member] | Foreign [Member] | Lme Tin Futures Lt February 2016 Contracts, Expiring February 2016 [Member]
Expiration date		February 2,016
United States Commodity Index Fund [Member] | Open Futures Contracts Short [Member] | Foreign [Member] | Lme Zinc Futures Lx February 2016 Contracts, Expiring February 2016 [Member]
Expiration date		February 2,016
United States Commodity Index Fund [Member] | Open Futures Contracts Short [Member] | Foreign [Member] | Lme Lead Futures Ll May 2016 Contracts, Expiring May 2016 [Member]
Expiration date		May 2,016
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.34%, 1/05/2017 [Member]
Expiration date	1/05/2017
Interest rate	0.34%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.38%, 1/12/2017 [Member]
Expiration date	1/12/2017
Interest rate	0.38%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.43%, 1/19/2017 [Member]
Expiration date	1/19/2017
Interest rate	0.43%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.36%, 1/26/2017 [Member]
Expiration date	1/26/2017
Interest rate	0.36%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.45%, 2/16/2017 [Member]
Expiration date	2/16/2017
Interest rate	0.45%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.45%, 3/02/2017 [Member]
Expiration date	3/02/2017
Interest rate	0.45%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.47%, 3/09/2017 [Member]
Expiration date	3/09/2017
Interest rate	0.47%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.43%, 3/30/2017 [Member]
Expiration date	3/30/2017
Interest rate	0.43%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.47%, 4/13/2017 [Member]
Expiration date	4/13/2017
Interest rate	0.47%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.46%, 4/20/2017 [Member]
Expiration date	4/20/2017
Interest rate	0.46%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.47%, 4/27/2017 [Member]
Expiration date	4/27/2017
Interest rate	0.47%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.49%, 5/04/2017 [Member]
Expiration date	5/04/2017
Interest rate	0.49%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.55%, 5/11/2017 [Member]
Expiration date	5/11/2017
Interest rate	0.55%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.60%, 5/18/2017 [Member]
Expiration date	5/18/2017
Interest rate	0.60%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.61%, 5/25/2017 [Member]
Expiration date	5/25/2017
Interest rate	0.61%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.60%, 6/01/2017 [Member]
Expiration date	6/01/2017
Interest rate	0.60%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.62%, 6/08/2017 [Member]
Expiration date	6/08/2017
Interest rate	0.62%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.65%, 6/15/2017 [Member]
Expiration date	6/15/2017
Interest rate	0.65%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.64%, 6/22/2017 [Member]
Expiration date	6/22/2017
Interest rate	0.64%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.60%, 6/29/2017 [Member]
Expiration date	6/29/2017
Interest rate	0.60%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.10%, 1/14/2016 [Member]
Expiration date		1/14/2016
Interest rate		0.10%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.23%, 3/03/2016 [Member]
Expiration date		3/03/2016
Interest rate		0.23%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.26%, 3/31/2016 [Member]
Expiration date		3/31/2016
Interest rate		0.26%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.26%, 5/05/2016 [Member]
Expiration date		5/05/2016
Interest rate		0.26%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.33%, 5/12/2016 [Member]
Expiration date		5/12/2016
Interest rate		0.33%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.35%, 5/26/2016 [Member]
Expiration date		5/26/2016
Interest rate		0.35%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.53%, 6/09/2016 [Member]
Expiration date		6/09/2016
Interest rate		0.53%
United States Commodity Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S. Treasury Bills 0.46%, 6/23/2016 [Member]
Expiration date		6/23/2016
Interest rate		0.46%
United States Copper Index Fund [Member]
Debt Instrument, Collateral Amount	$ 253,165	$ 433,440
United States Copper Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | COMEX Copper Futures HG March 2017 contracts, expiring March 2017 [Member]
Expiration date	March 2,017
United States Copper Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | COMEX Copper Futures HG March 2016 contracts, expiring March 2016 [Member]
Expiration date		March 2,016
United States Copper Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | COMEX Copper Futures HG May 2017 contracts, expiring May 2017 [Member]
Expiration date	May 2,017
United States Copper Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member]
Expiration date	5/11/2017
United States Copper Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.34%, 1/05/2017 [Member]
Expiration date	1/05/2017
Interest rate	0.34%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.44%, 1/26/2017 [Member]
Expiration date	1/26/2017
Interest rate	0.44%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.46%, 2/16/2017 [Member]
Expiration date	2/16/2017
Interest rate	0.46%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.48%, 3/09/2017 [Member]
Expiration date	3/09/2017
Interest rate	0.48%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.46%, 4/06/2017 [Member]
Expiration date	4/06/2017
Interest rate	0.46%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.47%, 4/13/2017 [Member]
Expiration date	4/13/2017
Interest rate	0.47%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.46%, 4/20/2017 [Member]
Expiration date	4/20/2017
Interest rate	0.46%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.47%, 4/27/2017 [Member]
Expiration date	4/27/2017
Interest rate	0.47%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.49%, 5/04/2017 [Member]
Expiration date	5/04/2017
Interest rate	0.49%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.60%, 5/18/2017 [Member]
Expiration date	5/18/2017
Interest rate	0.60%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.60%, 6/01/2017 [Member]
Expiration date	6/01/2017
Interest rate	0.60%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.62%, 6/08/2017 [Member]
Expiration date	6/08/2017
Interest rate	0.62%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.65%, 6/15/2017 [Member]
Expiration date	6/15/2017
Interest rate	0.65%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.64%, 6/22/2017 [Member]
Expiration date	6/22/2017
Interest rate	0.64%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.20%, 4/28/2016 [Member]
Expiration date		4/28/2016
Interest rate		0.20%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.26%, 5/05/2016 [Member]
Expiration date		5/05/2016
Interest rate		0.26%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.46%, 6/23/2016 [Member]
Expiration date		6/23/2016
Interest rate		0.46%
United States Copper Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | COMEX Copper Futures HG May 2017 contracts, expiring May 2017 [Member]
Interest rate	0.55%
United States Agriculture Index Fund [Member]
Debt Instrument, Collateral Amount	$ 208,306	$ 139,467
Interest rate	0.005%
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | Ice-Us Cotton 2 Futures Ct March 2016 Contracts, Expiring March 2016 [Member]
Expiration date		March 2,016
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | Ice-Us Sugar 11 Futures Sb May 2016 Contracts, Expiring April 2016 [Member]
Expiration date		April 2,016
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | Ice-Us Cocoa Futures Cc July 2016 Contracts, Expiring July 2016 [Member]
Expiration date		July 2,016
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | ICE-Canola Futures RS March 2016 contracts, expiring March 2016 [Member]
Expiration date		March 2,016
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | ICE-US Coffee-C Futures KC July 2016 contracts, expiring July 2016 [Member]
Expiration date		July 2,016
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-US Cocoa Futures CC March 2017 contracts, expiring March 2017 [Member]
Expiration date	March 2,017
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-US Coffee-C Futures KC July 2017 contracts, expiring July 2017 [Member]
Expiration date	July 2,017
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-US Sugar 11 Futures SB May 2017 contracts, expiring April 2017 [Member]
Expiration date	April 2,017
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-Canola Futures RS March 2017 contracts, expiring March 2017 [Member]
Expiration date	March 2,017
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | Foreign [Member] | ICE-US Cotton 2 Futures CT March 2017 contracts, expiring March 2017 [Member]
Expiration date	March 2,017
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CBOT Corn Futures C September 2016 contracts, expiring September 2016 [Member]
Expiration date		September 2,016
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | KCBT Hard Red Winter Wheat Futures KW May 2017 contracts, expiring May 2017 [Member]
Expiration date	May 2,017
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CME Feeder Cattle Futures FC March 2017 contracts, expiring March 2017 [Member]
Expiration date	March 2,017
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CBOT Soybean Oil Futures BO March 2017 contracts, expiring March 2017 [Member]
Expiration date	March 2,017
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CBOT Wheat Futures W March 2017 contracts, expiring March 2017 [Member]
Expiration date	March 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 Soybean Futures S March 2016 Contracts, Expiring March 2016 [Member]
Expiration date		March 2,016
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | Cme Feeder Cattle Futures Lc March 2016 Contracts, Expiring March 2016 [Member]
Expiration date		March 2,016
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | Cbot Soybean Oil Futures Bo July 2016, Expiring July 2016 [Member]
Expiration date		July 2,016
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CME Lean Hogs Futures LH April 2017 contracts, expiring April 2017 [Member]
Expiration date	April 2,017
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CME Live Cattle Futures LC April 2017 contracts, expiring April 2017 [Member]
Expiration date	April 2,017
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CBOT Soybean Meal Futures SM July 2017 contracts, expiring July 2017 [Member]
Expiration date	July 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] | CME Lean Hogs Futures LH February 2016 contracts, expiring February 2016 [Member]
Expiration date		February 2,016
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CME Live Cattle Futures LC February 2016 contracts, expiring February 2016 [Member]
Expiration date		February 2,016
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CBOT Soybean Meal Futures SM March 2016 contracts, expiring March 2016 [Member]
Expiration date		March 2,016
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | CBOT Wheat Futures W March 2016 contracts, expiring March 2016 [Member]
Expiration date		March 2,016
United States Agriculture Index Fund [Member] | Open Futures Contracts Long [Member] | United States Contracts [Member] | KCBT Hard Red Winter Wheat Futures KW May 2016 contracts, expiring May 2016 [Member]
Expiration date		May 2,016
United States Agriculture Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.34%, 1/05/2017 [Member]
Expiration date	1/05/2017
Interest rate	0.34%
United States Agriculture Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.45%, 2/16/2017 [Member]
Expiration date	2/16/2017
Interest rate	0.45%
United States Agriculture Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.49%, 5/04/2017 [Member]
Expiration date	5/04/2017
Interest rate	0.49%
United States Agriculture Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.60%, 5/18/2017 [Member]
Expiration date	5/18/2017
Interest rate	0.60%
United States Agriculture Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.64%, 6/22/2017 [Member]
Expiration date	6/22/2017
Interest rate	0.64%
United States Agriculture Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.20%, 4/28/2017 [Member]
Expiration date		4/28/2016
Interest rate		0.20%
United States Agriculture Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.26%, 5/05/2017 [Member]
Expiration date		5/05/2016
Interest rate		0.26%
United States Agriculture Index Fund [Member] | Cash Equivalents [Member] | United States Treasury Obligations [Member] | U.S .Treasury Bills 0.46%, 6/23/2017 [Member]
Expiration date		6/23/2016
Interest rate		0.46%

Statements of Operations

Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Gain (loss) on trading of commodity futures contracts:
Realized gain (loss) on closed positions	$ (22,057,127)	$ (128,761,842)	$ (85,949,027)
Change in unrealized gain (loss) on open positions	10,811,030	29,911,129	(49,496,908)
Realized gain (loss) on foreign currency transactions	(113)	18	(123)
Realized gain (loss) on short-term investments	0	3,812	0
Change in unrealized gain (loss) on foreign currency translations	504	(1,120)	14
Interest income	2,000,403	465,496	326,764
ETF transaction fees	18,900	16,100	25,150
Total income (loss)	(9,226,403)	(98,366,407)	(135,094,130)
Expenses
Management fees (Note 4)	4,842,987	4,542,429	5,939,763
Professional fees	704,658	1,075,066	756,301
Brokerage commissions	780,427	715,863	658,367
Directors' fees and insurance	74,722	114,250	146,584
Registration fees	0	0	850
Total expenses	6,402,794	6,447,608	7,501,865
Expense waiver (Note 4)	(147,813)	(124,812)	(154,313)
Net expenses	6,254,981	6,322,796	7,347,552
Net income (loss)	(15,481,384)	(104,689,203)	(142,441,682)
United States Commodity Index Fund [Member]
Gain (loss) on trading of commodity futures contracts:
Realized gain (loss) on closed positions	(22,063,913)	(127,566,722)	(85,846,605)
Change in unrealized gain (loss) on open positions	10,637,687	29,684,932	(49,056,906)
Realized gain (loss) on foreign currency transactions	0	0	6
Realized gain (loss) on short-term investments	0	3,645	0
Change in unrealized gain (loss) on foreign currency translations	0	0	(1)
Interest income	1,984,573	462,464	323,118
ETF transaction fees	17,500	15,050	23,400
Total income (loss)	(9,424,153)	(97,400,631)	(134,556,988)
Expenses
Management fees (Note 4)	4,810,916	4,513,975	5,887,414
Professional fees	553,904	948,893	594,787
Brokerage commissions	776,649	711,491	653,625
Directors' fees and insurance	74,029	113,376	144,809
Registration fees	0	0	850
Total expenses	6,215,498	6,287,735	7,281,485
Net income (loss)	$ (15,639,651)	$ (103,688,366)	$ (141,838,473)
Net income (loss) per share (in dollars per share)	$ (0.50)	$ (7.72)	$ (7.82)
Net income (loss) per weighted average share (in dollars per share)	$ (1.07)	$ (8.16)	$ (11.42)
Weighted average shares outstanding (in shares)	14,559,973	12,705,890	12,419,041
United States Copper Index Fund [Member]
Gain (loss) on trading of commodity futures contracts:
Realized gain (loss) on closed positions	$ (19,600)	$ (639,262)	$ (54,825)
Change in unrealized gain (loss) on open positions	269,200	16,900	(327,688)
Realized gain (loss) on short-term investments	0	17	0
Interest income	9,625	1,408	1,455
ETF transaction fees	1,400	700	1,750
Total income (loss)	260,625	(620,237)	(379,308)
Expenses
Management fees (Note 4)	19,170	12,760	20,483
Professional fees	78,043	61,175	65,914
Brokerage commissions	1,628	947	1,896
Directors' fees and insurance	392	418	658
Total expenses	99,233	75,300	88,951
Expense waiver (Note 4)	(75,640)	(59,601)	(62,989)
Net expenses	23,593	15,699	25,962
Net income (loss)	$ 237,032	$ (635,936)	$ (405,270)
Net income (loss) per share (in dollars per share)	$ 2.12	$ (4.86)	$ (3.82)
Net income (loss) per weighted average share (in dollars per share)	$ 1.18	$ (5.39)	$ (2.69)
Weighted average shares outstanding (in shares)	200,546	118,082	150,411
United States Agriculture Index Fund [Member]
Gain (loss) on trading of commodity futures contracts:
Realized gain (loss) on closed positions	$ 26,386	$ (373,442)	$ 60,213
Change in unrealized gain (loss) on open positions	(95,857)	72,733	(22,043)
Realized gain (loss) on foreign currency transactions	(113)	18	(129)
Change in unrealized gain (loss) on foreign currency translations	504	(1,120)	15
Interest income	6,205	1,466	1,176
Total income (loss)	(62,875)	(300,345)	39,232
Expenses
Management fees (Note 4)	12,901	13,599	17,092
Professional fees	72,711	55,955	48,227
Brokerage commissions	2,150	3,116	2,020
Directors' fees and insurance	301	385	569
Total expenses	88,063	73,055	67,908
Expense waiver (Note 4)	(72,173)	(56,318)	(46,339)
Net expenses	15,890	16,737	21,569
Net income (loss)	$ (78,765)	$ (317,082)	$ 17,663
Net income (loss) per share (in dollars per share)	$ (0.79)	$ (3.17)	$ 0.18
Net income (loss) per weighted average share (in dollars per share)	$ (0.79)	$ (3.17)	$ 0.18
Weighted average shares outstanding (in shares)	100,000	100,000	100,000

Statements of Changes in Capita

Statements of Changes in Capital - USD ($)	3 Months Ended				12 Months Ended
	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Balances, Beginning		$ 524,750,880			$ 524,750,880
Net income (loss)					(15,481,384)	$ (104,689,203)	$ (142,441,682)
Balances, Ending	$ 643,918,233		$ 524,750,880		643,918,233	524,750,880
United States Commodity Index Fund [Member]
Balances, Beginning		520,635,970		$ 709,120,840	520,635,970	709,120,840	512,945,022
Additions					207,139,996	155,622,096	439,876,572
Redemptions					(75,843,491)	(240,418,600)	(101,862,281)
Net income (loss)	(23,872,780)	$ (2,080,163)	(17,722,137)	$ (47,696,670)	(15,639,651)	(103,688,366)	(141,838,473)
Balances, Ending	$ 636,292,824		$ 520,635,970		$ 636,292,824	$ 520,635,970	$ 709,120,840
Shares Outstanding, Beginning		12,850,000		14,700,000	12,850,000	14,700,000	9,150,000
Additions					4,900,000	3,500,000	7,500,000
Redemptions					(1,850,000)	(5,350,000)	(1,950,000)
Shares Outstanding, Ending	15,900,000		12,850,000		15,900,000	12,850,000	14,700,000
Net Asset Value Per Share:
Net asset value, beginning of period (in dollars per share)		$ 40.52		$ 48.24	$ 40.52	$ 48.24	$ 56.06
Net asset value, end of period (in dollars per share)	$ 40.02		$ 40.52		$ 40.02	$ 40.52	$ 48.24
United States Copper Index Fund [Member]
Balances, Beginning		$ 2,135,390		$ 2,865,627	$ 2,135,390	$ 2,865,627	$ 2,292,199
Additions					3,352,232	799,533	3,118,249
Redemptions					0	(893,834)	(2,139,551)
Net income (loss)	$ 224,683	$ 10,749	$ (218,762)	$ (118,292)	237,032	(635,936)	(405,270)
Balances, Ending	$ 5,724,654		$ 2,135,390		$ 5,724,654	$ 2,135,390	$ 2,865,627
Shares Outstanding, Beginning		150,000		150,000	150,000	150,000	100,000
Additions					200,000	50,000	150,000
Redemptions					0	(50,000)	(100,000)
Shares Outstanding, Ending	350,000		150,000		350,000	150,000	150,000
Net Asset Value Per Share:
Net asset value, beginning of period (in dollars per share)		$ 14.24		$ 19.10	$ 14.24	$ 19.10	$ 22.92
Net asset value, end of period (in dollars per share)	$ 16.36		$ 14.24		$ 16.36	$ 14.24	$ 19.10
United States Agriculture Index Fund [Member]
Balances, Beginning		$ 1,979,520		$ 2,296,602	$ 1,979,520	$ 2,296,602	$ 2,278,939
Additions					0	0	0
Redemptions					0	0	0
Net income (loss)	$ (23,111)	$ (14,968)	$ (45,720)	$ (208,832)	(78,765)	(317,082)	17,663
Balances, Ending	$ 1,900,755		$ 1,979,520		$ 1,900,755	$ 1,979,520	$ 2,296,602
Shares Outstanding, Beginning		100,000		100,000	100,000	100,000	100,000
Additions					0	0	0
Redemptions					0	0	0
Shares Outstanding, Ending	100,000		100,000		100,000	100,000	100,000
Net Asset Value Per Share:
Net asset value, beginning of period (in dollars per share)		$ 19.80		$ 22.97	$ 19.80	$ 22.97	$ 22.79
Net asset value, end of period (in dollars per share)	$ 19.01		$ 19.80		$ 19.01	$ 19.80	$ 22.97
United States Commodity Index Funds Trust [Member]
Balances, Beginning		$ 524,750,880		$ 716,264,689	$ 524,750,880	$ 716,264,689	$ 519,713,382
Additions					210,492,228	156,421,629	442,994,821
Redemptions					(75,843,491)	(243,246,235)	(104,001,832)
Net income (loss)					(15,481,384)	(104,689,203)	(142,441,682)
Balances, Ending	$ 643,918,233		$ 524,750,880		$ 643,918,233	$ 524,750,880	$ 716,264,689
Shares Outstanding, Beginning		13,100,000		15,050,000	13,100,000	15,050,000	9,450,000
Additions					5,100,000	3,550,000	7,650,000
Redemptions					(1,850,000)	(5,500,000)	(2,050,000)
Shares Outstanding, Ending	16,350,000		13,100,000		16,350,000	13,100,000	15,050,000
Sponsor [Member] | United States Commodity Index Fund [Member]
Balances, Beginning		$ 0		$ 0	$ 0	$ 0	$ 0
Additions					0	0	0
Redemptions					0	0	0
Net income (loss)					0	0	0
Balances, Ending	$ 0		$ 0		$ 0	$ 0	$ 0
Shares Outstanding, Beginning		0		0	0	0	0
Additions					0	0	0
Redemptions					0	0	0
Shares Outstanding, Ending	0		0		0	0	0
Sponsor [Member] | United States Copper Index Fund [Member]
Balances, Beginning		$ 0		$ 0	$ 0	$ 0	$ 0
Additions					0	0	0
Redemptions					0	0	0
Net income (loss)					0	0	0
Balances, Ending	$ 0		$ 0		$ 0	$ 0	$ 0
Shares Outstanding, Beginning		0		0	0	0	0
Additions					0	0	0
Redemptions					0	0	0
Shares Outstanding, Ending	0		0		0	0	0
Sponsor [Member] | United States Agriculture Index Fund [Member]
Balances, Beginning		$ 0		$ 0	$ 0	$ 0	$ 0
Additions					0	0	0
Redemptions					0	0	0
Net income (loss)					0	0	0
Balances, Ending	$ 0		$ 0		$ 0	$ 0	$ 0
Shares Outstanding, Beginning		0		0	0	0	0
Additions					0	0	0
Redemptions					0	0	0
Shares Outstanding, Ending	0		0		0	0	0
Sponsor [Member] | United States Commodity Index Funds Trust [Member]
Balances, Beginning		$ 0		$ 0	$ 0	$ 0	$ 0
Additions					0	0	0
Redemptions					0	0	0
Net income (loss)					0	0	0
Balances, Ending	$ 0		$ 0		$ 0	$ 0	$ 0
Shares Outstanding, Beginning		0		0	0	0	0
Additions					0	0	0
Redemptions					0	0	0
Shares Outstanding, Ending	0		0		0	0	0
Shareholders [Member] | United States Commodity Index Fund [Member]
Balances, Beginning		$ 520,635,970		$ 709,120,840	$ 520,635,970	$ 709,120,840	$ 512,945,022
Additions					207,139,996	155,622,096	439,876,572
Redemptions					(75,843,491)	(240,418,600)	(101,862,281)
Net income (loss)					(15,639,651)	(103,688,366)	(141,838,473)
Balances, Ending	$ 636,292,824		$ 520,635,970		$ 636,292,824	$ 520,635,970	$ 709,120,840
Shares Outstanding, Beginning		12,850,000		14,700,000	12,850,000	14,700,000	9,150,000
Additions					4,900,000	3,500,000	7,500,000
Redemptions					(1,850,000)	(5,350,000)	(1,950,000)
Shares Outstanding, Ending	15,900,000		12,850,000		15,900,000	12,850,000	14,700,000
Shareholders [Member] | United States Copper Index Fund [Member]
Balances, Beginning		$ 2,135,390		$ 2,865,627	$ 2,135,390	$ 2,865,627	$ 2,292,199
Additions					3,352,232	799,533	3,118,249
Redemptions					0	(893,834)	(2,139,551)
Net income (loss)					237,032	(635,936)	(405,270)
Balances, Ending	$ 5,724,654		$ 2,135,390		$ 5,724,654	$ 2,135,390	$ 2,865,627
Shares Outstanding, Beginning		150,000		150,000	150,000	150,000	100,000
Additions					200,000	50,000	150,000
Redemptions					0	(50,000)	(100,000)
Shares Outstanding, Ending	350,000		150,000		350,000	150,000	150,000
Shareholders [Member] | United States Agriculture Index Fund [Member]
Balances, Beginning		$ 1,979,520		$ 2,296,602	$ 1,979,520	$ 2,296,602	$ 2,278,939
Additions					0	0	0
Redemptions					0	0	0
Net income (loss)					(78,765)	(317,082)	17,663
Balances, Ending	$ 1,900,755		$ 1,979,520		$ 1,900,755	$ 1,979,520	$ 2,296,602
Shares Outstanding, Beginning		100,000		100,000	100,000	100,000	100,000
Additions					0	0	0
Redemptions					0	0	0
Shares Outstanding, Ending	100,000		100,000		100,000	100,000	100,000
Shareholders [Member] | United States Commodity Index Funds Trust [Member]
Balances, Beginning		$ 524,750,880		$ 716,264,689	$ 524,750,880	$ 716,264,689	$ 519,713,382
Additions					210,492,228	156,421,629	442,994,821
Redemptions					(75,843,491)	(243,246,235)	(104,001,832)
Net income (loss)					(15,481,384)	(104,689,203)	(142,441,682)
Balances, Ending	$ 643,918,233		$ 524,750,880		$ 643,918,233	$ 524,750,880	$ 716,264,689
Shares Outstanding, Beginning		13,100,000		15,050,000	13,100,000	15,050,000	9,450,000
Additions					5,100,000	3,550,000	7,650,000
Redemptions					(1,850,000)	(5,500,000)	(2,050,000)
Shares Outstanding, Ending	16,350,000		13,100,000		16,350,000	13,100,000	15,050,000

Statements of Cash Flows

Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash Flows from Operating Activities:
Net income (loss)	$ (15,481,384)	$ (104,689,203)	$ (142,441,682)
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	16,052,639	24,535,826	(60,098,264)
Unrealized (gain) loss on open futures contracts	(10,811,030)	(29,911,129)	49,496,908
(Increase) decrease in receivable from Sponsor	(31,888)	3,829	125,972
(Increase) decrease in interest receivable	46	36	0
(Increase) decrease in directors' fees and insurance receivable	6,222	(6,222)	0
(Increase) decrease in ETF transaction fees receivable	(350)	1,050	(700)
Increase (decrease) in management fees payable	87,459	(172,944)	128,225
Increase (decrease) in professional fees payable	(75,269)	163,900	18,255
Increase (decrease) in brokerage commissions payable	11,200	0	20,000
Increase (decrease) in directors' fees and insurance payable	6,162	(15,792)	7,553
Increase (decrease) in registration fees payable	0	0	(152)
Net cash provided by (used in) operating activities	(10,236,193)	(110,090,649)	(152,743,885)
Cash Flows from Financing Activities:
Addition of shares	210,492,228	156,421,629	451,486,732
Redemption of shares	(69,828,108)	(286,982,884)	(60,265,183)
Net cash provided by (used in) financing activities	140,664,120	(130,561,255)	391,221,549
Net Increase (Decrease) in Cash and Cash Equivalents	130,427,927	(240,651,904)	238,477,664
Cash and Cash Equivalents, beginning of year	478,007,269	718,659,173	480,181,509
Cash and Cash Equivalents, end of year	608,435,196	478,007,269	718,659,173
United States Commodity Index Fund [Member]
Cash Flows from Operating Activities:
Net income (loss)	(15,639,651)	(103,688,366)	(141,838,473)
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	15,941,203	24,230,603	(59,905,773)
Unrealized (gain) loss on open futures contracts	(10,637,687)	(29,684,932)	49,056,906
(Increase) decrease in directors' fees and insurance receivable	6,190	(6,190)	0
(Increase) decrease in ETF transaction fees receivable	(350)	1,050	(700)
Increase (decrease) in management fees payable	85,619	(172,237)	128,287
Increase (decrease) in professional fees payable	(133,821)	199,184	151,042
Increase (decrease) in brokerage commissions payable	11,200	0	20,000
Increase (decrease) in directors' fees and insurance payable	6,164	(15,638)	7,439
Increase (decrease) in registration fees payable	0	0	(152)
Net cash provided by (used in) operating activities	(10,361,133)	(109,136,526)	(152,381,424)
Cash Flows from Financing Activities:
Addition of shares	207,139,996	155,622,096	448,368,483
Redemption of shares	(69,828,108)	(284,155,249)	(58,125,632)
Net cash provided by (used in) financing activities	137,311,888	(128,533,153)	390,242,851
Net Increase (Decrease) in Cash and Cash Equivalents	126,950,755	(237,669,679)	237,861,427
Cash and Cash Equivalents, beginning of year	474,315,271	711,984,950	474,123,523
Cash and Cash Equivalents, end of year	601,266,026	474,315,271	711,984,950
United States Copper Index Fund [Member]
Cash Flows from Operating Activities:
Net income (loss)	237,032	(635,936)	(405,270)
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	180,275	(96,292)	(211,188)
Unrealized (gain) loss on open futures contracts	(269,200)	(16,900)	327,688
(Increase) decrease in receivable from Sponsor	(16,039)	(16,771)	38,959
(Increase) decrease in interest receivable	0	25	0
(Increase) decrease in directors' fees and insurance receivable	32	(32)	0
Increase (decrease) in management fees payable	1,882	(456)	383
Increase (decrease) in professional fees payable	30,138	2,581	(40,651)
Increase (decrease) in directors' fees and insurance payable	47	(35)	19
Net cash provided by (used in) operating activities	164,167	(763,816)	(290,060)
Cash Flows from Financing Activities:
Addition of shares	3,352,232	799,533	3,118,249
Redemption of shares	0	(893,834)	(2,139,551)
Net cash provided by (used in) financing activities	3,352,232	(94,301)	978,698
Net Increase (Decrease) in Cash and Cash Equivalents	3,516,399	(858,117)	688,638
Cash and Cash Equivalents, beginning of year	1,871,256	2,729,373	2,040,735
Cash and Cash Equivalents, end of year	5,387,655	1,871,256	2,729,373
United States Agricultural Index Fund [Member]
Cash Flows from Operating Activities:
Net income (loss)	(78,765)	(317,082)	17,663
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	(68,839)	83,359	7,255
Unrealized (gain) loss on open futures contracts	95,857	(72,733)	22,043
(Increase) decrease in receivable from Sponsor	(15,849)	(17,185)	42,633
(Increase) decrease in interest receivable	46	0	0
Increase (decrease) in management fees payable	(42)	877	(276)
Increase (decrease) in professional fees payable	28,414	1,131	(45,500)
Increase (decrease) in directors' fees and insurance payable	(49)	(40)	52
Net cash provided by (used in) operating activities	(39,227)	(321,673)	43,870
Cash Flows from Financing Activities:
Addition of shares	0	0	0
Redemption of shares	0	0	0
Net cash provided by (used in) financing activities	0	0	0
Net Increase (Decrease) in Cash and Cash Equivalents	(39,227)	(321,673)	43,870
Cash and Cash Equivalents, beginning of year	1,820,742	2,142,415	2,098,545
Cash and Cash Equivalents, end of year	$ 1,781,515	$ 1,820,742	$ 2,142,415

ORGANIZATION AND BUSINESS

ORGANIZATION AND BUSINESS	12 Months Ended
	Dec. 31, 2016
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. 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”). United States Commodity Funds LLC (“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 annual report on Form 10-K. 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, the REX S&P MLP Inverse Fund, the United States 3X Oil Fund and the United States 3X Short Oil Fund, all of which are funds that are currently in registration and have not commenced operations. The funds that are series of the USCF Funds Trust (the “REX Funds”) 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

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Summary Of Significant Accounting Policies	NOTE 2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES The financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“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. 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 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 financial statements. Changes in the unrealized gains or losses between periods are reflected in the 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 on all open commodity futures contracts are accrued on a full-turn basis. 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 year ended December 31, 2016 for any Trust Series. 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. Authorized Participants may purchase Creation Baskets or redeem Redemption Baskets only in blocks of 50,000 shares. 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 50,000 100,000 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’ statements of financial condition as receivable for shares sold, and amounts payable to Authorized Participants upon redemption are reflected as payable for shares redeemed. 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 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 December 31, 2016, USCF held 5 40 5 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 include money market funds and overnight deposits or time deposits with original maturity dates of six months or less. Certain prior year amounts have been reclassified to conform to the current year presentation. The preparation of 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 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	12 Months Ended
	Dec. 31, 2016
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 On November 10, 2010, the Trust transferred $1,000 to each of USMI, USAG and CPER, which was deemed a capital contribution to each series. 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 has not commenced operations as of the filing of this annual report on Form 10-K. 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 nonexchange 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 December 31, 2016, USCI held 2,686 5,892 2,138 721 9,344 1,120 21,901 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 collectively 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 December 31, 2016, CPER held 92 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 December 31, 2016, USAG held 29 29 8 2 68 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 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 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	12 Months Ended
	Dec. 31, 2016
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 years ended December 31, 2016 and 2015, none of the Trust Series incurred any registration fees or other offering expenses. During the year ended December 31, 2014, USCI incurred $ 850 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, 2016 amounted to a total of $ 582,050 74,029 392 301 569,303 113,376 418 385 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 amounted to a total of $ 550,000 60,000 50,000 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 below. In addition, USCF pays certain expenses normally borne by each of CPER and USAG to the extent that such expenses exceed 0.15 75,640 72,173 Note 5 – Contracts and Agreements

CONTRACTS AND AGREEMENTS

CONTRACTS AND AGREEMENTS	12 Months Ended
	Dec. 31, 2016
Contractors [Abstract]
Contracts And Agreements	NOTE 5 - 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 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 Year ended For the Year ended For the Year ended December 31, 2016 December 31, 2015 December 31, 2014 Total commissions accrued to brokers $ 776,649 $ 711,491 $ 653,625 Total commissions as an annualized percentage of net assets 0.13 % 0.13 % 0.09 % Commissions accrued as a result of rebalancing $ 752,519 $ 675,051 $ 614,322 Percentage of commissions accrued as a result of rebalancing 96.89 % 94.88 % 93.99 % Commissions accrued as a result of creation and redemption activity $ 24,130 $ 36,440 $ 39,303 Percentage of commissions accrued as a result of creation and redemption activity 3.11 % 5.12 % 6.01 % The increase in USCI’s total commissions accrued to brokers for the year ended December 31, 2016, compared to the year ended December 31, 2015, was primarily a result of increased brokerage fees due to a higher number of contracts held and traded, and for the year ended December 31, 2015, compared to the year ended December 31, 2014, the increase in USCI’s total commissions accrued to brokers was primarily a result of increased brokerage fees due to a higher number of contracts held and traded, a higher level of create activity, and transition trades due to change of FCM. However, there can be no assurance that commission costs and portfolio turnover will not cause commission expenses to rise in future quarters. For the Year ended For the Year ended For the Year ended December 31, 2016 December 31, 2015 December 31, 2014 Total commissions accrued to brokers $ 1,628 $ 947 $ 1,896 Total commissions as an annualized percentage of net assets 0.06 % 0.05 % 0.06 % Commissions accrued as a result of rebalancing $ 1,455 $ 588 $ 1,382 Percentage of commissions accrued as a result of rebalancing 89.37 % 62.09 % 72.89 % Commissions accrued as a result of creation and redemption activity $ 173 $ 359 $ 514 Percentage of commissions accrued as a result of creation and redemption activity 10.63 % 37.91 % 27.11 % The increase in CPER’s total commissions accrued to brokers for the year ended December 31, 2016, compared to the year ended December 31, 2015, was primarily a result of increased brokerage fees due to a higher number of contracts held and traded as well as net creates; and for the year ended December 31, 2015, compared to the year ended December 31, 2014, the decrease in CPER’s total commissions accrued to brokers was primarily a result of decreased brokerage fees due to a lower number of contracts held and traded. However, there can be no assurance that commission costs and portfolio turnover will not cause commission expenses to rise in future quarters. For the Year ended For the Year ended For the Year ended December 31, 2016 December 31, 2015 December 31, 2014 Total commissions accrued to brokers $ 2,150 $ 3,116 $ 2,020 Total commissions as an annualized percentage of net assets 0.11 % 0.15 % 0.08 % Commissions accrued as a result of rebalancing $ 2,150 $ 3,116 $ 2,020 Percentage of commissions accrued as a result of rebalancing 100 % 100 % 100 % 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 year ended December 31, 2016, compared to the year ended December 31, 2015, was lower primarily as a result of decreased brokerage fees due to a lower number of contracts held and traded; and for the year ended December 31, 2015, compared to the year ended December 31, 2014, was higher primarily as a result of increased brokerage fees due to a higher number of contracts held and traded. 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 0.6% 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

FINANCIAL INSTRUMENTS, OFF-BALA

FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES	12 Months Ended
	Dec. 31, 2016
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. ICE Clear Europe, and provide the efficiencies and benefits that centralized clearing on an exchange offers to traders of futures contracts, including credit risk intermediation and the ability to offset positions initiated with different counterparties. 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 December 31, 2016. 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 December 31, 2016 and December 31, 2015, 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 December 31, 2016 and December 31, 2015, USCI held cash deposits and investments in Treasuries in the amounts of $ 641,316,546 530,306,994 5,640,820 2,304,696 1,989,821 1,960,209 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 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	12 Months Ended
	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Financial Highlights	NOTE 7 - FINANCIAL HIGHLIGHTS The following tables present per share performance data and other supplemental financial data for each Trust Series for the years ended December 31, 2016, 2015 and 2014 for the shareholders. This information has been derived from information presented in the financial statements. Year ended Year ended Year ended December 31, 2016 December 31, 2015 December 31, 2014 Per Share Operating Performance: Net asset value, beginning of year $ 40.52 $ 48.24 $ 56.06 Total income (loss) (0.07) (7.23) (7.23) Net expenses (0.43) (0.49) (0.59) Net increase (decrease) in net asset value (0.50) (7.72) (7.82) Net asset value, end of year $ 40.02 $ 40.52 $ 48.24 Total Return (1.23) % (16.00) % (13.95) % Ratios to Average Net Assets Total income (loss) (1.57) % (17.26) % (19.17) % Management fees 0.80 %* 0.80 %** 0.84 %** Total expenses excluding management fees 0.23 % 0.31 % 0.20 % Expenses waived — %* — %** — %** Net expenses excluding management fees 0.23 % 0.31 % 0.20 % Net income (loss) (2.60) % (18.38) % (20.20) % * Effective January 1, 2016, USCF permanently lowered the management fee to 0.80 ** From May 1, 2014 through December 31, 2016, USCF contractually lowered the management fee to 0.80 CPER Year ended Year ended Year ended December 31, 2016 December 31, 2015 December 31, 2014 Per Share Operating Performance: Net asset value, beginning of year $ 14.24 $ 19.10 $ 22.92 Total income (loss) 2.24 (4.73) (3.65) Net expenses (0.12) (0.13) (0.17) Net increase (decrease) in net asset value 2.12 (4.86) (3.82) Net asset value, end of year $ 16.36 $ 14.24 $ 19.10 Total Return 14.89 % (25.45) % (16.67) % Ratios to Average Net Assets Total income (loss) 8.84 % (31.59) % (12.04) % Management fees 0.65 %* 0.65 %** 0.65 %** Total expenses excluding management fees 2.71 % 3.19 %† 2.17 % Expenses waived (2.56) %* † (3.04) %**† (2.00) %** Net expenses excluding management fees 0.15 % 0.15 %† 0.17 % Net income (loss) 8.04 % (32.39) % (12.86) % * Effective January 1, 2016, USCF permanently lowered the management fee to 0.65 ** From May 1, 2014 through December 31, 2016, USCF contractually lowered the management fee to 0.65 † 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. USAG Year ended Year ended Year ended December 31, 2016 December 31, 2015 December 31, 2014 Per Share Operating Performance: Net asset value, beginning of year $ 19.80 $ 22.97 $ 22.79 Total income (loss) (0.63) (3.00) 0.40 Net expenses (0.16) (0.17) (0.22) Net increase (decrease) in net asset value (0.79) (3.17) 0.18 Net asset value, end of year $ 19.01 $ 19.80 $ 22.97 Total Return (3.99) % (13.80) % 0.79 % Ratios to Average Net Assets Total income (loss) (3.17) % (14.36) % 1.61 % Management fees 0.65 %* 0.65 %** 0.70 %** Total expenses excluding management fees 3.79 % 2.84 %† 2.08 %† Expenses waived (3.64) %* † (2.69) %**† (1.90) %** † Net expenses excluding management fees 0.15 % 0.15 %† 0.18 %† Net income (loss) (3.97) % (15.16) % 0.72 % * Effective January 1, 2016, USCF permanently lowered the management fee to 0.65 ** From May 1, 2014 through December 31, 2016, USCF contractually 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.

QUARTERLY FINANCIAL DATA (Unaud

QUARTERLY FINANCIAL DATA (Unaudited)	12 Months Ended
	Dec. 31, 2016
Quarterly Financial Data [Abstract]
Quarterly financial data (Unaudited)	NOTE 8 – QUARTERLY FINANCIAL DATA (Unaudited) The following summarized (unaudited) quarterly financial information presents the results of operations and other data for the three-month periods ended March 31, June 30, September 30 and December 31, 2016 and 2015. USCI First Quarter Second Quarter Third Quarter Fourth Quarter 2016 2016 2016 2016 Total Income (Loss) $ (731,412) $ 37,071,255 $ (23,532,292) $ (22,231,704) Total Expenses 1,348,751 1,451,019 1,774,652 1,641,076 Net Income (Loss) $ (2,080,163) $ 35,620,236 $ (25,306,944) $ (23,872,780) Net Income (Loss) per Share $ (0.11) $ 2.66 $ (1.57) $ (1.48) First Quarter Second Quarter Third Quarter Fourth Quarter 2015 2015 2015 2015 Total Income (Loss) $ (45,897,074) $ 26,535,162 $ (61,754,738) $ (16,283,981) Total Expenses 1,799,596 1,531,178 1,518,805 1,438,156 Net Income (Loss) $ (47,696,670) $ 25,003,984 $ (63,273,543) $ (17,722,137) Net Income (Loss) per Share $ (3.30) $ 2.18 $ (5.23) $ (1.37) CPER First Quarter Second Quarter Third Quarter Fourth Quarter 2016 2016 2016 2016 Total Income (Loss) $ 14,977 $ 3,652 $ 9,405 $ 232,591 Total Expenses 20,562 23,415 27,792 27,464 Expense waivers (16,334) (17,699) (22,051) (19,556) Net expenses 4,228 5,716 5,741 7,908 Net Income (Loss) $ 10,749 $ (2,064) $ 3,664 $ 224,683 Net Income (Loss) per Share $ 0.29 $ (0.01) $ 0.02 $ 1.82 First Quarter Second Quarter Third Quarter Fourth Quarter 2015 2015 2015 2015 Total Income (Loss) $ (114,469) $ (85,649) $ (205,814) $ (214,305) Total Expenses 14,647 20,497 19,747 20,409 Expense waivers (10,824) (16,779) (16,046) (15,952) Net expenses 3,823 3,718 3,701 4,457 Net Income (Loss) $ (118,292) $ (89,367) $ (209,515) $ (218,762) Net Income (Loss) per Share $ (0.56) $ (0.90) $ (1.95) $ (1.45) First Quarter Second Quarter Third Quarter Fourth Quarter 2016 2016 2016 2016 Total Income (Loss) $ (11,112) $ 172,101 $ (204,613) $ (19,251) Total Expenses 18,802 20,729 25,510 23,022 Expense waivers (14,946) (16,612) (21,453) (19,162) Net expenses 3,856 4,117 4,057 3,860 Net Income (Loss) $ (14,968) $ 167,984 $ (208,670) $ (23,111) Net Income (Loss) per Share $ (0.15) $ 1.68 $ (2.09) $ (0.23) First Quarter Second Quarter Third Quarter Fourth Quarter 2015 2015 2015 2015 Total Income (Loss) $ (204,458) $ 153,029 $ (207,130) $ (41,786) Total Expenses 14,265 19,522 19,213 20,055 Expense waivers (9,891) (15,392) (14,914) (16,121) Net expenses 4,374 4,130 4,299 3,934 Net Income (Loss) $ (208,832) $ 148,899 $ (211,429) $ (45,720) Net Income (Loss) per Share $ (2.09) $ 1.49 $ (2.12) $ (0.45)

FAIR VALUE OF FINANCIAL INSTRUM

FAIR VALUE OF FINANCIAL INSTRUMENTS	12 Months Ended
	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value Of Financial Instruments	NOTE 9 – 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. 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 USCI’s securities at December 31, 2015 using the fair value hierarchy: At December 31, 2015 Total Level I Level II Level III Short-Term Investments $ 299,704,608 $ 299,704,608 $ — $ — Exchange-Traded Futures Contracts Foreign Contracts (4,020,212) (4,020,212) — — United States Contracts (4,562,015) (4,562,015) — — During the year ended December 31, 2015, 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 CPER’s securities at December 31, 2015 using the fair value hierarchy: At December 31, 2015 Total Level I Level II Level III Short-Term Investments $ 998,899 $ 998,899 $ — $ — Exchange-Traded Futures Contracts United States Contracts (180,625) (180,625) — — During the year ended December 31, 2015, 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 following table summarizes the valuation of USAG’s securities at December 31, 2015 using the fair value hierarchy: At December 31, 2015 Total Level I Level II Level III Short-Term Investments $ 749,059 $ 749,059 $ — $ — Exchange-Traded Futures Contracts Foreign Contracts 48,270 48,270 — — United States Contracts (42,113) (42,113) — — During the year ended December 31, 2015, 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. Statements of Derivatives not Accounted for as Financial Condition Fair Value At Fair Value At Hedging Instruments Location December 31, 2016 December 31, 2016 Futures - Commodity Contracts Assets $ 2,055,460 $ (8,582,227) Fair Value of Derivative Instruments Held by CPER Statements of Derivatives not Accounted for as Financial Condition Fair Value At Fair Value At Hedging Instruments Location December 31, 2016 December 31, 2015 Futures - Commodity Contracts Assets $ 88,575 $ (180,625) Fair Value of Derivative Instruments Held by USAG Statements of Derivatives not Accounted for as Financial Condition Fair Value At Fair Value At Hedging Instruments Location December 31, 2016 December 31, 2015 Futures - Commodity Contracts Assets $ (89,700) $ 6,157 For the year ended For the year ended For the year ended December 31, 2016 December 31, 2015 December 31, 2014 Change in Change in Change in Realized Unrealized Realized Unrealized Realized Unrealized Derivatives Location of Gain (Loss) Gain (Loss) Gain (Loss) Gain (Loss) Gain (Loss) Gain (Loss) not Accounted Gain (Loss) on on on on on on for as on Derivatives Derivatives Derivatives Derivatives Derivatives Derivatives Derivatives Hedging Recognized Recognized Recognized Recognized Recognized Recognized Recognized Instruments in Income in Income in Income in Income in Income in Income in Income Futures - Realized gain (loss) on closed positions $ (22,063,913) $ (127,566,722) $ (85,846,605) Change in unrealized gain (loss) on open $ 10,637,687 $ 29,684,932 $ (49,056,906) The Effect of Derivative Instruments on the Statements of Operations of CPER For the year ended For the year ended For the year ended December 31, 2016 December 31, 2015 December 31, 2014 Change in Change in Change in Realized Unrealized Realized Unrealized Realized Unrealized Derivatives Location of Gain (Loss) Gain (Loss) Gain (Loss) Gain (Loss) Gain (Loss) Gain (Loss) not Accounted Gain (Loss) on on on on on on for as on Derivatives Derivatives Derivatives Derivatives Derivatives Derivatives Derivatives Hedging Recognized Recognized Recognized Recognized Recognized Recognized Recognized Instruments in Income in Income in Income in Income in Income in Income in Income Futures - Realized gain (loss) on closed positions $ (19,600) $ (639,262) $ (54,825) Change in unrealized gain (loss) on open $ 269,200 $ 16,900 $ (327,688) The Effect of Derivative Instruments on the Statements of Operations of USAG For the year ended For the year ended For the year ended December 31, 2016 December 31, 2015 December 31, 2014 Change in Change in Change in Realized Unrealized Realized Unrealized Realized Unrealized Derivatives Location of Gain (Loss) Gain (Loss) Gain (Loss) Gain (Loss) Gain (Loss) Gain (Loss) not Accounted Gain (Loss) on on on on on on for as on Derivatives Derivatives Derivatives Derivatives Derivatives Derivatives Derivatives Hedging Recognized Recognized Recognized Recognized Recognized Recognized Recognized Instruments in Income in Income in Income in Income in Income in Income in Income Futures - Realized gain (loss) on closed positions $ 26,386 $ (373,442) $ 60,213 Change in unrealized gain (loss) on open $ (95,857) $ 72,733 $ (22,043)

RECENT ACCOUNTING PRONOUNCEMENT

RECENT ACCOUNTING PRONOUNCEMENTS	12 Months Ended
	Dec. 31, 2016
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Pronouncements	NOTE 10 – RECENT ACCOUNTING PRONOUNCEMENTS In August 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) 2015-14, Revenue from Contracts with Customers, modifying ASU 2014-09. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2015-14 is effective for fiscal years beginning on or after December 15, 2016, and interim periods within those annual periods. Early application is permitted. At this time, management does not believe there will be any impact to the Fund’s financial statements.

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	12 Months Ended
	Dec. 31, 2016
Subsequent Events [Abstract]
Subsequent Events	NOTE 11 – SUBSEQUENT EVENTS The Trust and each Trust Series have performed an evaluation of subsequent events through the date the financial statements were issued. This evaluation did not result in any subsequent events that necessitated disclosures and/or adjustments other than what is noted below: Effective January 1, 2016, USCF permanently lowered the management fee for USCI to 0.80% (80 basis points) per annum of average daily total net assets for USCI and 0.65% (65 basis points) per annum of average daily total net assets for both CPER and USAG.

SUMMARY OF SIGNIFICANT ACCOUN19

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2016
Basis of Presentation	Basis of Presentation The financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“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.
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 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 financial statements. Changes in the unrealized gains or losses between periods are reflected in the 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 year ended December 31, 2016 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 Authorized Participants may purchase Creation Baskets or redeem Redemption Baskets only in blocks of 50,000 shares. 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 50,000 100,000 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’ statements of financial condition as receivable for shares sold, and amounts payable to Authorized Participants upon redemption are reflected as payable for shares redeemed.
Calculation of NAV	Calculation of Net Asset Value Per Share 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 December 31, 2016, USCF held 5 40 5
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 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 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)	12 Months Ended
	Dec. 31, 2016
Contractors [Abstract]
Brokerage Commissions	USCI For the Year ended For the Year ended For the Year ended December 31, 2016 December 31, 2015 December 31, 2014 Total commissions accrued to brokers $ 776,649 $ 711,491 $ 653,625 Total commissions as an annualized percentage of net assets 0.13 % 0.13 % 0.09 % Commissions accrued as a result of rebalancing $ 752,519 $ 675,051 $ 614,322 Percentage of commissions accrued as a result of rebalancing 96.89 % 94.88 % 93.99 % Commissions accrued as a result of creation and redemption activity $ 24,130 $ 36,440 $ 39,303 Percentage of commissions accrued as a result of creation and redemption activity 3.11 % 5.12 % 6.01 % CPER For the Year ended For the Year ended For the Year ended December 31, 2016 December 31, 2015 December 31, 2014 Total commissions accrued to brokers $ 1,628 $ 947 $ 1,896 Total commissions as an annualized percentage of net assets 0.06 % 0.05 % 0.06 % Commissions accrued as a result of rebalancing $ 1,455 $ 588 $ 1,382 Percentage of commissions accrued as a result of rebalancing 89.37 % 62.09 % 72.89 % Commissions accrued as a result of creation and redemption activity $ 173 $ 359 $ 514 Percentage of commissions accrued as a result of creation and redemption activity 10.63 % 37.91 % 27.11 % USAG For the Year ended For the Year ended For the Year ended December 31, 2016 December 31, 2015 December 31, 2014 Total commissions accrued to brokers $ 2,150 $ 3,116 $ 2,020 Total commissions as an annualized percentage of net assets 0.11 % 0.15 % 0.08 % Commissions accrued as a result of rebalancing $ 2,150 $ 3,116 $ 2,020 Percentage of commissions accrued as a result of rebalancing 100 % 100 % 100 % 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)	12 Months Ended
	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Per Unit Performance Data and Other Supplemental Financial Data for Usci, Cper, Usag and Usmi	USCI Year ended Year ended Year ended December 31, 2016 December 31, 2015 December 31, 2014 Per Share Operating Performance: Net asset value, beginning of year $ 40.52 $ 48.24 $ 56.06 Total income (loss) (0.07) (7.23) (7.23) Net expenses (0.43) (0.49) (0.59) Net increase (decrease) in net asset value (0.50) (7.72) (7.82) Net asset value, end of year $ 40.02 $ 40.52 $ 48.24 Total Return (1.23) % (16.00) % (13.95) % Ratios to Average Net Assets Total income (loss) (1.57) % (17.26) % (19.17) % Management fees 0.80 %* 0.80 %** 0.84 %** Total expenses excluding management fees 0.23 % 0.31 % 0.20 % Expenses waived — %* — %** — %** Net expenses excluding management fees 0.23 % 0.31 % 0.20 % Net income (loss) (2.60) % (18.38) % (20.20) % * Effective January 1, 2016, USCF permanently lowered the management fee to 0.80 ** From May 1, 2014 through December 31, 2016, USCF contractually lowered the management fee to 0.80 CPER Year ended Year ended Year ended December 31, 2016 December 31, 2015 December 31, 2014 Per Share Operating Performance: Net asset value, beginning of year $ 14.24 $ 19.10 $ 22.92 Total income (loss) 2.24 (4.73) (3.65) Net expenses (0.12) (0.13) (0.17) Net increase (decrease) in net asset value 2.12 (4.86) (3.82) Net asset value, end of year $ 16.36 $ 14.24 $ 19.10 Total Return 14.89 % (25.45) % (16.67) % Ratios to Average Net Assets Total income (loss) 8.84 % (31.59) % (12.04) % Management fees 0.65 %* 0.65 %** 0.65 %** Total expenses excluding management fees 2.71 % 3.19 %† 2.17 % Expenses waived (2.56) %* † (3.04) %**† (2.00) %** Net expenses excluding management fees 0.15 % 0.15 %† 0.17 % Net income (loss) 8.04 % (32.39) % (12.86) % * Effective January 1, 2016, USCF permanently lowered the management fee to 0.65 ** From May 1, 2014 through December 31, 2016, USCF contractually lowered the management fee to 0.65 † 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. USAG Year ended Year ended Year ended December 31, 2016 December 31, 2015 December 31, 2014 Per Share Operating Performance: Net asset value, beginning of year $ 19.80 $ 22.97 $ 22.79 Total income (loss) (0.63) (3.00) 0.40 Net expenses (0.16) (0.17) (0.22) Net increase (decrease) in net asset value (0.79) (3.17) 0.18 Net asset value, end of year $ 19.01 $ 19.80 $ 22.97 Total Return (3.99) % (13.80) % 0.79 % Ratios to Average Net Assets Total income (loss) (3.17) % (14.36) % 1.61 % Management fees 0.65 %* 0.65 %** 0.70 %** Total expenses excluding management fees 3.79 % 2.84 %† 2.08 %† Expenses waived (3.64) %* † (2.69) %**† (1.90) %** † Net expenses excluding management fees 0.15 % 0.15 %† 0.18 %† Net income (loss) (3.97) % (15.16) % 0.72 % * Effective January 1, 2016, USCF permanently lowered the management fee to 0.65 ** From May 1, 2014 through December 31, 2016, USCF contractually 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.

QUARTERLY FINANCIAL DATA (Una22

QUARTERLY FINANCIAL DATA (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Summary of Quarterly Financial Information	The following summarized (unaudited) quarterly financial information presents the results of operations and other data for the three-month periods ended March 31, June 30, September 30 and December 31, 2016 and 2015. USCI First Quarter Second Quarter Third Quarter Fourth Quarter 2016 2016 2016 2016 Total Income (Loss) $ (731,412) $ 37,071,255 $ (23,532,292) $ (22,231,704) Total Expenses 1,348,751 1,451,019 1,774,652 1,641,076 Net Income (Loss) $ (2,080,163) $ 35,620,236 $ (25,306,944) $ (23,872,780) Net Income (Loss) per Share $ (0.11) $ 2.66 $ (1.57) $ (1.48) First Quarter Second Quarter Third Quarter Fourth Quarter 2015 2015 2015 2015 Total Income (Loss) $ (45,897,074) $ 26,535,162 $ (61,754,738) $ (16,283,981) Total Expenses 1,799,596 1,531,178 1,518,805 1,438,156 Net Income (Loss) $ (47,696,670) $ 25,003,984 $ (63,273,543) $ (17,722,137) Net Income (Loss) per Share $ (3.30) $ 2.18 $ (5.23) $ (1.37) CPER First Quarter Second Quarter Third Quarter Fourth Quarter 2016 2016 2016 2016 Total Income (Loss) $ 14,977 $ 3,652 $ 9,405 $ 232,591 Total Expenses 20,562 23,415 27,792 27,464 Expense waivers (16,334) (17,699) (22,051) (19,556) Net expenses 4,228 5,716 5,741 7,908 Net Income (Loss) $ 10,749 $ (2,064) $ 3,664 $ 224,683 Net Income (Loss) per Share $ 0.29 $ (0.01) $ 0.02 $ 1.82 First Quarter Second Quarter Third Quarter Fourth Quarter 2015 2015 2015 2015 Total Income (Loss) $ (114,469) $ (85,649) $ (205,814) $ (214,305) Total Expenses 14,647 20,497 19,747 20,409 Expense waivers (10,824) (16,779) (16,046) (15,952) Net expenses 3,823 3,718 3,701 4,457 Net Income (Loss) $ (118,292) $ (89,367) $ (209,515) $ (218,762) Net Income (Loss) per Share $ (0.56) $ (0.90) $ (1.95) $ (1.45) USAG First Quarter Second Quarter Third Quarter Fourth Quarter 2016 2016 2016 2016 Total Income (Loss) $ (11,112) $ 172,101 $ (204,613) $ (19,251) Total Expenses 18,802 20,729 25,510 23,022 Expense waivers (14,946) (16,612) (21,453) (19,162) Net expenses 3,856 4,117 4,057 3,860 Net Income (Loss) $ (14,968) $ 167,984 $ (208,670) $ (23,111) Net Income (Loss) per Share $ (0.15) $ 1.68 $ (2.09) $ (0.23) First Quarter Second Quarter Third Quarter Fourth Quarter 2015 2015 2015 2015 Total Income (Loss) $ (204,458) $ 153,029 $ (207,130) $ (41,786) Total Expenses 14,265 19,522 19,213 20,055 Expense waivers (9,891) (15,392) (14,914) (16,121) Net expenses 4,374 4,130 4,299 3,934 Net Income (Loss) $ (208,832) $ 148,899 $ (211,429) $ (45,720) Net Income (Loss) per Share $ (2.09) $ 1.49 $ (2.12) $ (0.45)

FAIR VALUE OF FINANCIAL INSTR23

FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)	12 Months Ended
	Dec. 31, 2016
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 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 USCI’s securities at December 31, 2015 using the fair value hierarchy: At December 31, 2015 Total Level I Level II Level III Short-Term Investments $ 299,704,608 $ 299,704,608 $ — $ — Exchange-Traded Futures Contracts Foreign Contracts (4,020,212) (4,020,212) — — United States Contracts (4,562,015) (4,562,015) — — During the year ended December 31, 2015, 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 CPER’s securities at December 31, 2015 using the fair value hierarchy: At December 31, 2015 Total Level I Level II Level III Short-Term Investments $ 998,899 $ 998,899 $ — $ — Exchange-Traded Futures Contracts United States Contracts (180,625) (180,625) — — During the year ended December 31, 2015, 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 following table summarizes the valuation of USAG’s securities at December 31, 2015 using the fair value hierarchy: At December 31, 2015 Total Level I Level II Level III Short-Term Investments $ 749,059 $ 749,059 $ — $ — Exchange-Traded Futures Contracts Foreign Contracts 48,270 48,270 — — United States Contracts (42,113) (42,113) — — During the year ended December 31, 2015, there were no transfers between Level I and Level II.
Fair Value of Derivative Instruments Held by Usci, Cper, Usag and Usmi	Fair Value of Derivative Instruments Held by USCI Statements of Derivatives not Accounted for as Financial Condition Fair Value At Fair Value At Hedging Instruments Location December 31, 2016 December 31, 2016 Futures - Commodity Contracts Assets $ 2,055,460 $ (8,582,227) Fair Value of Derivative Instruments Held by CPER Statements of Derivatives not Accounted for as Financial Condition Fair Value At Fair Value At Hedging Instruments Location December 31, 2016 December 31, 2015 Futures - Commodity Contracts Assets $ 88,575 $ (180,625) Statements of Derivatives not Accounted for as Financial Condition Fair Value At Fair Value At Hedging Instruments Location December 31, 2016 December 31, 2015 Futures - Commodity Contracts Assets $ (89,700) $ 6,157
Effect of Derivative Instruments on Statements of Operations of Usci, Cper, Usag and Usmi	The Effect of Derivative Instruments on the Statements of Operations of USCI For the year ended For the year ended For the year ended December 31, 2016 December 31, 2015 December 31, 2014 Change in Change in Change in Realized Unrealized Realized Unrealized Realized Unrealized Derivatives Location of Gain (Loss) Gain (Loss) Gain (Loss) Gain (Loss) Gain (Loss) Gain (Loss) not Accounted Gain (Loss) on on on on on on for as on Derivatives Derivatives Derivatives Derivatives Derivatives Derivatives Derivatives Hedging Recognized Recognized Recognized Recognized Recognized Recognized Recognized Instruments in Income in Income in Income in Income in Income in Income in Income Futures - Realized gain (loss) on closed positions $ (22,063,913) $ (127,566,722) $ (85,846,605) Change in unrealized gain (loss) on open $ 10,637,687 $ 29,684,932 $ (49,056,906) The Effect of Derivative Instruments on the Statements of Operations of CPER For the year ended For the year ended For the year ended December 31, 2016 December 31, 2015 December 31, 2014 Change in Change in Change in Realized Unrealized Realized Unrealized Realized Unrealized Derivatives Location of Gain (Loss) Gain (Loss) Gain (Loss) Gain (Loss) Gain (Loss) Gain (Loss) not Accounted Gain (Loss) on on on on on on for as on Derivatives Derivatives Derivatives Derivatives Derivatives Derivatives Derivatives Hedging Recognized Recognized Recognized Recognized Recognized Recognized Recognized Instruments in Income in Income in Income in Income in Income in Income in Income Futures - Realized gain (loss) on closed positions $ (19,600) $ (639,262) $ (54,825) Change in unrealized gain (loss) on open $ 269,200 $ 16,900 $ (327,688) The Effect of Derivative Instruments on the Statements of Operations of USAG For the year ended For the year ended For the year ended December 31, 2016 December 31, 2015 December 31, 2014 Change in Change in Change in Realized Unrealized Realized Unrealized Realized Unrealized Derivatives Location of Gain (Loss) Gain (Loss) Gain (Loss) Gain (Loss) Gain (Loss) Gain (Loss) not Accounted Gain (Loss) on on on on on on for as on Derivatives Derivatives Derivatives Derivatives Derivatives Derivatives Derivatives Hedging Recognized Recognized Recognized Recognized Recognized Recognized Recognized Instruments in Income in Income in Income in Income in Income in Income in Income Futures - Realized gain (loss) on closed positions $ 26,386 $ (373,442) $ 60,213 Change in unrealized gain (loss) on open $ (95,857) $ 72,733 $ (22,043)

ORGANIZATION AND BUSINESS (Addi

ORGANIZATION AND BUSINESS (Additional Information) (Details) - $ / Unit	Dec. 31, 2016	Nov. 15, 2011	Aug. 10, 2010
United States Commodity 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
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
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

SUMMARY OF SIGNIFICANT ACCOUN25

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Additional Information) (Details)	12 Months Ended
	Dec. 31, 2016$ / Unitshares	Apr. 13, 2012$ / Unit	Nov. 15, 2011$ / Unit	Aug. 10, 2010$ / Unit
Significant Accounting Policies [Line Items]
Minimum likelihood of tax benefits being recognized upon ultimate settlement	50.00%
Cash equivalents maturity period	6 months
United States Commodity Index Fund [Member]
Significant Accounting Policies [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
Weighted average shares outstanding | shares	5
United States Copper Index Fund [Member]
Significant Accounting Policies [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
Weighted average shares outstanding | shares	40
United States Agriculture Index Fund [Member]
Significant Accounting Policies [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
Weighted average shares outstanding | shares	5
Creation Baskets [Member] | Effective as of May 1, 2012 [Member]
Significant Accounting Policies [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	100,000
Creation Baskets [Member] | Effective as of May 1, 2012 [Member] | United States Commodity Index Fund [Member]
Significant Accounting Policies [Line Items]
Number of Units per basket	50,000

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

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

Dec. 31, 2015USD ($)$ / shares

Dec. 31, 2014$ / shares

Dec. 31, 2013$ / shares

Apr. 13, 2012$ / shares$ / Unit

Sep. 19, 2011USD ($)

Nov. 10, 2010USD ($)

Capital Unit [Line Items]

Sponsor capital contribution

$ 1,000

$ 0

$ 0

$ 20

Capital contribution to trust series

$ 1,000

Units acquisition | shares

20

Partner sponsor units description

On November 10, 2010, the Trust transferred $1,000 to each of USMI, USAG and CPER, which was deemed a capital contribution to each series. 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

$ 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

$ 40.02

$ 40.52

$ 48.24

$ 56.06

Number of units issued | shares

100,000

Value of unit issued

$ 5,000,000

Number of registered units

100,000

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

Capital Unit [Line Items]

Future contract held

21,901

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

Capital Unit [Line Items]

Future contract held

2,686

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

Capital Unit [Line Items]

Future contract held

5,892

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

Capital Unit [Line Items]

Future contract held

2,138

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

Capital Unit [Line Items]

Future contract held

721

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

Capital Unit [Line Items]

Future contract held

9,344

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

Capital Unit [Line Items]

Future contract held

1,120

United States Agriculture Index Fund [Member]

Capital Unit [Line Items]

Sponsor capital contribution

$ 0

$ 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

$ 19.01

$ 19.80

22.97

22.79

$ 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

68

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

Capital Unit [Line Items]

Future contract held

29

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

Capital Unit [Line Items]

Future contract held

29

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

Capital Unit [Line Items]

Future contract held

8

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

Capital Unit [Line Items]

Future contract held

2

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

$ 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

$ 16.36

$ 14.24

$ 19.10

$ 22.92

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] | Commodity Exchange Inc [Member]

Capital Unit [Line Items]

Future contract held

92

FEES PAID BY EACH TRUST SERIE27

FEES PAID BY EACH TRUST SERIES AND RELATED PARTY TRANSACTIONS (Additional Information) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Fees Paid and Related Party Transactions [Line Items]
Trustee annual fee									$ 3,000
Noninterest Expense Directors Fees									74,722	$ 114,250	$ 146,584
Expense waiver									147,813	124,812	154,313
Other Cost and Expense Operating									0	0	$ 850
Directors and Officers Liability Insurance [Member]
Fees Paid and Related Party Transactions [Line Items]
Noninterest Expense Directors Fees									$ 582,050	$ 569,303
United States Commodity Index Fund [Member]
Fees Paid and Related Party Transactions [Line Items]
Percentage of average daily net assets paid	0.13%				0.13%				0.13%	0.13%	0.09%
Noninterest Expense Directors Fees									$ 74,029	$ 113,376	$ 144,809
Estimated investor tax reporting cost									550,000
Other Cost and Expense Operating									$ 0	$ 0	$ 850
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]
Percentage of average daily net assets paid	0.06%				0.05%				0.06%	0.05%	0.06%
Noninterest Expense Directors Fees									$ 392	$ 418	$ 658
Estimated investor tax reporting cost									$ 60,000
Costs and expenses annual limit for reimbursement									0.15%
Expense waiver	$ 19,556	$ 22,051	$ 17,699	$ 16,334	$ 15,952	$ 16,046	$ 16,779	$ 10,824	$ 75,640	$ 59,601	$ 62,989
United States Agriculture Index Fund [Member]
Fees Paid and Related Party Transactions [Line Items]
Percentage of average daily net assets paid	0.11%				0.15%				0.11%	0.15%	0.08%
Noninterest Expense Directors Fees									$ 301	$ 385	$ 569
Estimated investor tax reporting cost									50,000
Expense waiver	$ 19,162	$ 21,453	$ 16,612	$ 14,946	$ 16,121	$ 14,914	$ 15,392	$ 9,891	$ 72,173	$ 56,318	$ 46,339
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 ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Long Duration Contracts Assumptions By Product and Guarantee [Line Items]
Brokerage commissions	$ 780,427	$ 715,863	$ 658,367
United States Commodity Index Fund [Member]
Long Duration Contracts Assumptions By Product and Guarantee [Line Items]
Brokerage commissions	$ 776,649	$ 711,491	$ 653,625
Brokerage commissions as a percentage of average daily net assets	0.13%	0.13%	0.09%
United States Commodity Index Fund [Member] | Rebalancing Investments Transaction [Member]
Long Duration Contracts Assumptions By Product and Guarantee [Line Items]
Brokerage commissions	$ 752,519	$ 675,051	$ 614,322
Brokerage commissions as a percentage of average daily net assets	96.89%	94.88%	93.99%
United States Commodity Index Fund [Member] | Creation and Redemption Activity [Member]
Long Duration Contracts Assumptions By Product and Guarantee [Line Items]
Brokerage commissions	$ 24,130	$ 36,440	$ 39,303
Brokerage commissions as a percentage of average daily net assets	3.11%	5.12%	6.01%
United States Copper Index Fund [Member]
Long Duration Contracts Assumptions By Product and Guarantee [Line Items]
Brokerage commissions	$ 1,628	$ 947	$ 1,896
Brokerage commissions as a percentage of average daily net assets	0.06%	0.05%	0.06%
United States Copper Index Fund [Member] | Rebalancing Investments Transaction [Member]
Long Duration Contracts Assumptions By Product and Guarantee [Line Items]
Brokerage commissions	$ 1,455	$ 588	$ 1,382
Brokerage commissions as a percentage of average daily net assets	89.37%	62.09%	72.89%
United States Copper Index Fund [Member] | Creation and Redemption Activity [Member]
Long Duration Contracts Assumptions By Product and Guarantee [Line Items]
Brokerage commissions	$ 173	$ 359	$ 514
Brokerage commissions as a percentage of average daily net assets	10.63%	37.91%	27.11%
United States Agriculture Index Fund [Member]
Long Duration Contracts Assumptions By Product and Guarantee [Line Items]
Brokerage commissions	$ 2,150	$ 3,116	$ 2,020
Brokerage commissions as a percentage of average daily net assets	0.11%	0.15%	0.08%
United States Agriculture Index Fund [Member] | Rebalancing Investments Transaction [Member]
Long Duration Contracts Assumptions By Product and Guarantee [Line Items]
Brokerage commissions	$ 2,150	$ 3,116	$ 2,020
Brokerage commissions as a percentage of average daily net assets	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	$ 0
Brokerage commissions as a percentage of average daily net assets	0.00%	0.00%	0.00%

CONTRACTS AND AGREEMENTS (Addit

CONTRACTS AND AGREEMENTS (Additional Information) (Details)	12 Months Ended
	Dec. 31, 2016USD ($)$ / Unit
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Annual transfer agency services fee	$ 20,000
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 0.6% to arrive at the actual fee paid.
Licensing Agreements [Member]
Long-Duration Contracts, Assumptions by Product and Guarantee [Line Items]
Annual licensing fee	$ 15,000
Management fee paid to SummerHaven by USCF	an annual fee of 0.06% of the average daily total net assets of each Trust Series.
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-BA30

FINANCIAL INSTRUMENTS, OFF-BALANCE SHEET RISKS AND CONTINGENCIES (Additional Information) (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
United States Commodity Index Fund [Member]
Carrying Amounts and Fair Values of Financial Instruments or Liabilities [Line Items]
Cash deposits and investments in Treasuries	$ 641,316,546	$ 530,306,994
United States Copper Index Fund [Member]
Carrying Amounts and Fair Values of Financial Instruments or Liabilities [Line Items]
Cash deposits and investments in Treasuries	5,640,820	2,304,696
United States Agriculture Index Fund [Member]
Carrying Amounts and Fair Values of Financial Instruments or Liabilities [Line Items]
Cash deposits and investments in Treasuries	$ 1,989,821	$ 1,960,209

FINANCIAL HIGHLIGHTS (Per Unit

FINANCIAL HIGHLIGHTS (Per Unit Performance Data and Other Supplemental Financial Data) (Details) - $ / shares		12 Months Ended
		Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
United States Commodity Index Fund [Member]
Per Share Operating Performance:
Net asset value, beginning of period (in dollars per share)		$ 40.52		$ 48.24		$ 56.06
Total income (loss)		(0.07)		(7.23)		(7.23)
Net expenses		(0.43)		(0.49)		(0.59)
Net increase (decrease) in net asset value		(0.50)		(7.72)		(7.82)
Net asset value, end of period (in dollars per share)		$ 40.02		$ 40.52		$ 48.24
Total Return		(1.23%)		(16.00%)		(13.95%)
Ratios to Average Net Assets
Total income (loss)		(1.57%)		(17.26%)		(19.17%)
Management fees		0.80%	[1]	0.80%	[2]	0.84%	[2]
Total expenses excluding management fees		0.23%		0.31%		0.20%
Expenses waived		0.00%	[1]	0.00%	[2]	0.00%	[2]
Net expenses excluding management fees		0.23%		0.31%		0.20%
Net income (loss)		(2.60%)		(18.38%)		(20.20%)
United States Copper Index Fund [Member]
Per Share Operating Performance:
Net asset value, beginning of period (in dollars per share)		$ 14.24		$ 19.10		$ 22.92
Total income (loss)		2.24		(4.73)		(3.65)
Net expenses		(0.12)		(0.13)		(0.17)
Net increase (decrease) in net asset value		2.12		(4.86)		(3.82)
Net asset value, end of period (in dollars per share)		$ 16.36		$ 14.24		$ 19.10
Total Return		14.89%		(25.45%)		(16.67%)
Ratios to Average Net Assets
Total income (loss)		8.84%		(31.59%)		(12.04%)
Management fees		0.65%	[3]	0.65%	[4]	0.65%	[4]
Total expenses excluding management fees		2.71%		3.19%	[5]	2.17%
Expenses waived		(2.56%)	[3],[5]	(3.04%)	[4],[5]	(2.00%)	[4]
Net expenses excluding management fees		0.15%		0.15%	[5]	0.17%
Net income (loss)		8.04%		(32.39%)		(12.86%)
United States Agriculture Index Fund [Member]
Per Share Operating Performance:
Net asset value, beginning of period (in dollars per share)		$ 19.80		$ 22.97		$ 22.79
Total income (loss)		(0.63)		(3)		0.40
Net expenses		(0.16)		(0.17)		(0.22)
Net increase (decrease) in net asset value		(0.79)		(3.17)		0.18
Net asset value, end of period (in dollars per share)		$ 19.01		$ 19.80		$ 22.97
Total Return		(3.99%)		(13.80%)		0.79%
Ratios to Average Net Assets
Total income (loss)		(3.17%)		(14.36%)		1.61%
Management fees		0.65%	[6]	0.65%	[7]	0.70%	[7]
Total expenses excluding management fees		3.79%		2.84%		2.08%
Expenses waived	[8]	(3.64%)	[6]	(2.69%)	[7]	(1.90%)	[7]
Net expenses excluding management fees		0.15%		0.15%		0.18%
Net income (loss)		(3.97%)		(15.16%)		0.72%
[1]	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.
[2]	From May 1, 2014 through December 31, 2016, USCF contractually lowered the management fee to 0.80% 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]	From May 1, 2014 through December 31, 2016, USCF contractually lowered the management fee to 0.65% per annum of average daily total net assets for CPER.
[5]	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.
[6]	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.
[7]	From May 1, 2014 through December 31, 2016, USCF contractually lowered the management fee to 0.65% per annum of average daily total net assets for USAG.
[8]	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 Uni32

FINANCIAL HIGHLIGHTS (Per Unit Performance Data and Other Supplemental Financial Data) (Parenthetical) (Details)		12 Months Ended
		Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
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		2.56%	[1],[2]	3.04%	[2],[3]	2.00%	[3]
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		0.65%
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	[5]	3.64%	[4]	2.69%	[6]	1.90%	[6]
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		0.00%	[7]	0.00%	[8]	0.00%	[8]
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		0.80%
United States Commodity Index Fund [Member] | Effective May 1, 2014 and continuing through December 31, 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%
[1]	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.
[2]	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.
[3]	From May 1, 2014 through December 31, 2016, USCF contractually lowered the management fee to 0.65% per annum of average daily total net assets for CPER.
[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]	From May 1, 2014 through December 31, 2016, USCF contractually lowered the management fee to 0.65% per annum of average daily total net assets for USAG.
[7]	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.
[8]	From May 1, 2014 through December 31, 2016, USCF contractually lowered the management fee to 0.80% per annum of average daily total net assets for USCI.

QUARTERLY FINANCIAL DATA (Una33

QUARTERLY FINANCIAL DATA (Unaudited) (Summary of Quarterly Financial Information) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Data [Line Items]
Total Income (Loss)									$ (9,226,403)	$ (98,366,407)	$ (135,094,130)
Total Expenses									6,402,794	6,447,608	7,501,865
Expense waivers									(147,813)	(124,812)	(154,313)
Net expenses									6,254,981	6,322,796	7,347,552
Net Income (Loss)									(15,481,384)	(104,689,203)	(142,441,682)
United States Commodity Index Fund [Member]
Quarterly Financial Data [Line Items]
Total Income (Loss)	$ (22,231,704)	$ (23,532,292)	$ 37,071,255	$ (731,412)	$ (16,283,981)	$ (61,754,738)	$ 26,535,162	$ (45,897,074)	(9,424,153)	(97,400,631)	(134,556,988)
Total Expenses	1,641,076	1,774,652	1,451,019	1,348,751	1,438,156	1,518,805	1,531,178	1,799,596	6,215,498	6,287,735	7,281,485
Net Income (Loss)	$ (23,872,780)	$ (25,306,944)	$ 35,620,236	$ (2,080,163)	$ (17,722,137)	$ (63,273,543)	$ 25,003,984	$ (47,696,670)	$ (15,639,651)	$ (103,688,366)	$ (141,838,473)
Net Income (Loss) per Share	$ (1.48)	$ (1.57)	$ 2.66	$ (0.11)	$ (1.37)	$ (5.23)	$ 2.18	$ (3.30)	$ (0.50)	$ (7.72)	$ (7.82)
United States Copper Index Fund [Member]
Quarterly Financial Data [Line Items]
Total Income (Loss)	$ 232,591	$ 9,405	$ 3,652	$ 14,977	$ (214,305)	$ (205,814)	$ (85,649)	$ (114,469)	$ 260,625	$ (620,237)	$ (379,308)
Total Expenses	27,464	27,792	23,415	20,562	20,409	19,747	20,497	14,647	99,233	75,300	88,951
Expense waivers	(19,556)	(22,051)	(17,699)	(16,334)	(15,952)	(16,046)	(16,779)	(10,824)	(75,640)	(59,601)	(62,989)
Net expenses	7,908	5,741	5,716	4,228	4,457	3,701	3,718	3,823	23,593	15,699	25,962
Net Income (Loss)	$ 224,683	$ 3,664	$ (2,064)	$ 10,749	$ (218,762)	$ (209,515)	$ (89,367)	$ (118,292)	$ 237,032	$ (635,936)	$ (405,270)
Net Income (Loss) per Share	$ 1.82	$ 0.02	$ (0.01)	$ 0.29	$ (1.45)	$ (1.95)	$ (0.90)	$ (0.56)	$ 2.12	$ (4.86)	$ (3.82)
United States Agriculture Index Fund [Member]
Quarterly Financial Data [Line Items]
Total Income (Loss)	$ (19,251)	$ (204,613)	$ 172,101	$ (11,112)	$ (41,786)	$ (207,130)	$ 153,029	$ (204,458)	$ (62,875)	$ (300,345)	$ 39,232
Total Expenses	23,022	25,510	20,729	18,802	20,055	19,213	19,522	14,265	88,063	73,055	67,908
Expense waivers	(19,162)	(21,453)	(16,612)	(14,946)	(16,121)	(14,914)	(15,392)	(9,891)	(72,173)	(56,318)	(46,339)
Net expenses	3,860	4,057	4,117	3,856	3,934	4,299	4,130	4,374	15,890	16,737	21,569
Net Income (Loss)	$ (23,111)	$ (208,670)	$ 167,984	$ (14,968)	$ (45,720)	$ (211,429)	$ 148,899	$ (208,832)	$ (78,765)	$ (317,082)	$ 17,663
Net Income (Loss) per Share	$ (0.23)	$ (2.09)	$ 1.68	$ (0.15)	$ (0.45)	$ (2.12)	$ 1.49	$ (2.09)	$ (0.79)	$ (3.17)	$ 0.18

FAIR VALUE OF FINANCIAL INSTR34

FAIR VALUE OF FINANCIAL INSTRUMENTS (Valuation of Securities Using Fair Value Hierarchy) (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
United States Commodity Index Fund [Member] | Short-Term Investments [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Securities, fair value	$ 514,192,445	$ 299,704,608
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	(3,366,242)	(4,020,212)
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	5,421,702	(4,562,015)
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	514,192,445	299,704,608
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	(3,366,242)	(4,020,212)
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	5,421,702	(4,562,015)
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	4,541,320	998,899
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	88,575	(180,625)
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	4,541,320	998,899
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	88,575	(180,625)
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	1,397,843	749,059
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	(90,442)	48,270
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	742	(42,113)
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	1,397,843	749,059
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	(90,442)	48,270
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	742	(42,113)
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 INSTR35

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 ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
United States Commodity Index Fund [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 2,055,460	$ (8,582,227)
United States Copper Index Fund [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	88,575	(180,625)
United States Agriculture Index Fund [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ (89,700)	$ 6,157

FAIR VALUE OF FINANCIAL INSTR36

FAIR VALUE OF FINANCIAL INSTRUMENTS (Effect of Derivative Instruments on Statements of Operations of Usci, Cper, Usag and Usmi) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	$ (22,057,127)	$ (128,761,842)	$ (85,949,027)
Change in Unrealized Gain (Loss) on Derivatives Recognized in Income	10,811,030	29,911,129	(49,496,908)
United States Commodity Index Fund [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(22,063,913)	(127,566,722)	(85,846,605)
Change in Unrealized Gain (Loss) on Derivatives Recognized in Income	10,637,687	29,684,932	(49,056,906)
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	(22,063,913)	(127,566,722)	(85,846,605)
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	10,637,687	29,684,932	(49,056,906)
United States Copper Index Fund [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	(19,600)	(639,262)	(54,825)
Change in Unrealized Gain (Loss) on Derivatives Recognized in Income	269,200	16,900	(327,688)
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	(19,600)	(639,262)	(54,825)
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	269,200	16,900	(327,688)
United States Agriculture Index Fund [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Realized Gain (Loss) on Derivatives Recognized in Income	26,386	(373,442)	60,213
Change in Unrealized Gain (Loss) on Derivatives Recognized in Income	(95,857)	72,733	(22,043)
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	26,386	(373,442)	60,213
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	$ (95,857)	$ 72,733	$ (22,043)

SUBSEQUENT EVENTS (Additional I

SUBSEQUENT EVENTS (Additional Information) (Details)	Dec. 31, 2016
United States Commodity Index [Member]
Subsequent Event [Line Items]
Percentage Of Average Daily Net Assets	0.65%
United States Commodity Fund [Member]
Subsequent Event [Line Items]
Percentage Of Average Daily Net Assets	0.80%