Condensed Schedule of Investments	Sep. 30, 2021 USD ($) contract
United States Commodity Index Fund | United States Money Market Funds
Market Value	$ 218,101,877
% of Partners' Capital	92.61%
United States Commodity Index Fund | United States Money Market Funds | Goldman Sachs Financial Square Government Fund - Institutional Shares, 0.03%
Shares/Principal Amount	$ 143,561,263
Market Value	$ 143,561,263
% of Partners' Capital	60.96%
United States Commodity Index Fund | Open Commodity Futures Contracts - Long | NYMEX WTI Crude Oil Futures CL December 2021 contracts, expiring November 2021 | United States Contracts
Notional Amount	$ 12,525,260
Number of Contracts | contract	225
Fair Value/Unrealized Gain (Loss) on Open Commodity Contracts	$ 4,282,241
% of Partners' Capital	1.82%
United States Commodity Index Fund | Open Commodity Futures Contracts - Long | NYMEX RBOB Gasoline Futures RB December 2021 contracts, expiring November 2021 | United States Contracts
Notional Amount	$ 16,861,519
Number of Contracts | contract	188
Fair Value/Unrealized Gain (Loss) on Open Commodity Contracts	$ 163,046
% of Partners' Capital	0.07%
United States Commodity Index Fund | Open Commodity Futures Contracts - Long | ICE Cotton Futures CT December 2021 contracts, expiring December 2021 | United States Contracts
Notional Amount	$ 15,500,853
Number of Contracts | contract	344
Fair Value/Unrealized Gain (Loss) on Open Commodity Contracts	$ 2,696,747
% of Partners' Capital	1.14%
United States Commodity Index Fund | Open Commodity Futures Contracts - Long | CBOT Soybean Oil Futures BO December 2021 contracts, expiring December 2021 | United States Contracts
Notional Amount	$ 17,307,860
Number of Contracts | contract	484
Fair Value/Unrealized Gain (Loss) on Open Commodity Contracts	$ (264,284)
% of Partners' Capital	(0.11%)
United States Commodity Index Fund | Open Commodity Futures Contracts - Long | CME Lean Hogs Futures LH December 2021 contracts, expiring December 2021 | United States Contracts
Notional Amount	$ 17,286,553
Number of Contracts | contract	517
Fair Value/Unrealized Gain (Loss) on Open Commodity Contracts	$ 374,167
% of Partners' Capital	0.16%
United States Commodity Index Fund | Open Commodity Futures Contracts - Long | COMEX Copper Futures HG December 2021 contracts, expiring December 2021 | United States Contracts
Notional Amount	$ 16,508,612
Number of Contracts | contract	157
Fair Value/Unrealized Gain (Loss) on Open Commodity Contracts	$ (459,287)
% of Partners' Capital	(0.20%)
United States Commodity Index Fund | Open Commodity Futures Contracts - Long | COMEX Silver Futures SI December 2021 contracts, expiring December 2021 | United States Contracts
Notional Amount	$ 16,520,501
Number of Contracts | contract	149
Fair Value/Unrealized Gain (Loss) on Open Commodity Contracts	$ (95,486)
% of Partners' Capital	(0.04%)
United States Commodity Index Fund | Open Commodity Futures Contracts - Long | NYMEX Platinum Futures PL January 2022 contracts, expiring January 2022 | United States Contracts
Notional Amount	$ 17,278,350
Number of Contracts | contract	345
Fair Value/Unrealized Gain (Loss) on Open Commodity Contracts	$ (676,950)
% of Partners' Capital	(0.29%)
United States Commodity Index Fund | Open Commodity Futures Contracts - Long | NYMEX NY Harbour ULSD Futures HO February 2022 contracts, expiring January 2022 [Member] | United States Contracts
Notional Amount	$ 15,566,889
Number of Contracts | contract	177
Fair Value/Unrealized Gain (Loss) on Open Commodity Contracts	$ 1,570,712
% of Partners' Capital	0.67%
United States Commodity Index Fund | Open Commodity Futures Contracts - Long | ICE Brent Crude Futures CO January 2022 contracts, expiring November 2021 | United Kingdom Contracts
Notional Amount	$ 16,833,699
Number of Contracts | contract	217
Fair Value/Unrealized Gain (Loss) on Open Commodity Contracts	$ (9,689)
% of Partners' Capital	0.00%
United States Commodity Index Fund | Open Commodity Futures Contracts - Long | ICE Low Sulphur Gasoil Futures QS February 2022 contracts, expiring February 2022 | United Kingdom Contracts
Notional Amount	$ 16,884,651
Number of Contracts | contract	257
Fair Value/Unrealized Gain (Loss) on Open Commodity Contracts	$ 148,024
% of Partners' Capital	0.06%
United States Commodity Index Fund | Open Commodity Futures Contracts - Long | LME Tin Futures LT November 2021 contracts, expiring November 2021 | Foreign Contracts
Notional Amount	$ 16,836,735
Number of Contracts | contract	94
Fair Value/Unrealized Gain (Loss) on Open Commodity Contracts	$ (564,865)
% of Partners' Capital	(0.24%)
United States Commodity Index Fund | Open Commodity Futures Contracts - Long | LME Nickel Futures LN February 2022 contracts, expiring February 2022 | Foreign Contracts
Notional Amount	$ 16,369,653
Number of Contracts | contract	148
Fair Value/Unrealized Gain (Loss) on Open Commodity Contracts	$ (452,697)
% of Partners' Capital	(0.19%)
United States Commodity Index Fund | Open Commodity Futures Contracts - Long | LME Tin Futures LT October 2021 contracts, expiring October 2021 | Foreign Contracts
Notional Amount	$ 16,791,110
Number of Contracts | contract	99
Fair Value/Unrealized Gain (Loss) on Open Commodity Contracts	$ 544,285
% of Partners' Capital	0.23%
United States Commodity Index Fund | Open Commodity Futures Contracts - Long | LME Lead Futures LL December 2021 contracts, expiring December 2021 | Foreign Contracts
Notional Amount	$ 18,657,306
Number of Contracts | contract	320
Fair Value/Unrealized Gain (Loss) on Open Commodity Contracts	$ (1,889,306)
% of Partners' Capital	(0.80%)
United States Commodity Index Fund | Open Commodity Futures Contracts - Short | Foreign Contracts
Notional Amount	$ 229,322,802
Number of Contracts | contract	3,829
Fair Value/Unrealized Gain (Loss) on Open Commodity Contracts	$ 5,966,412
% of Partners' Capital	2.53%
United States Commodity Index Fund | Open Commodity Futures Contracts - Short | LME Tin Futures LT October 2021 contracts, expiring October 2021 | Foreign Contracts
Notional Amount	$ (17,890,775)
Number of Contracts | contract	99
Fair Value/Unrealized Gain (Loss) on Open Commodity Contracts	$ 555,380
% of Partners' Capital	0.23%
United States Commodity Index Fund | Open Commodity Futures Contracts - Short | LME Lead Futures LL December 2021 contracts, expiring December 2021 | Foreign Contracts
Notional Amount	$ (515,974)
Number of Contracts | contract	9
Fair Value/Unrealized Gain (Loss) on Open Commodity Contracts	$ 44,374
% of Partners' Capital	0.02%
United States Commodity Index Fund | Cash Equivalents | United States Money Market Funds | RBC U.S. Government Money Market Fund - Institutional Shares, 0.03%
Shares/Principal Amount	$ 74,540,614
Market Value	$ 74,540,614
% of Partners' Capital	31.65%
United States Copper Index Fund | United States Money Market Funds
Market Value	$ 248,955,787
% of Partners' Capital	104.70%
United States Copper Index Fund | United States Money Market Funds | Goldman Sachs Financial Square Government Fund - Institutional Shares, 0.03%
Shares/Principal Amount	$ 115,265,408
Market Value	$ 115,265,408
% of Partners' Capital	48.48%
United States Copper Index Fund | United States Money Market Funds | RBC U.S. Government Money Market Fund - Institutional Shares, 0.03%
Shares/Principal Amount	$ 133,690,379
Market Value	$ 133,690,379
% of Partners' Capital	56.22%
United States Copper Index Fund | Open Commodity Futures Contracts - Long | United States Contracts. | COMEX Copper Futures HG December 2021 contracts, expiring December 2021
Notional Amount	$ 241,352,184
Number of Contracts | contract	2,326
Fair Value/Unrealized Gain (Loss) on Open Commodity Contracts	$ (3,576,834)
% of Partners' Capital	(1.50%)