TRUST SERIES (Details)										1 Months Ended				9 Months Ended
	May 08, 2019 USD ($) shares	Oct. 03, 2012 shares	Jun. 28, 2012 shares	Apr. 13, 2012 shares	Dec. 07, 2011 shares	Nov. 14, 2011 shares	Sep. 14, 2011 shares	Sep. 06, 2011	Aug. 10, 2010 USD ($) $ / shares shares	Nov. 15, 2011 USD ($) $ / shares shares	Sep. 19, 2011 shares	Jul. 30, 2010	Dec. 21, 2009 USD ($) shares	Sep. 30, 2021 USD ($) contract $ / shares	Jun. 30, 2021 $ / shares	Dec. 31, 2020 USD ($) $ / shares	Sep. 30, 2020 $ / shares	Jun. 30, 2020 $ / shares	Dec. 31, 2019 $ / shares	Mar. 31, 2018 USD ($)	Nov. 10, 2010 USD ($)
Capital Unit
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
Commodity Exchange Inc [Member]
Capital Unit
Future contract held | contract														2,326
Futures Contracts [Member]
Capital Unit
Future contract held | contract														3,829
Futures Contracts [Member] | NYMEX [Member]
Capital Unit
Future contract held | contract														935
Futures Contracts [Member] | Ice Futures [Member]
Capital Unit
Future contract held | contract														818
Futures Contracts [Member] | Chicago Board of Trade [Member]
Capital Unit
Future contract held | contract														484
Futures Contracts [Member] | Chicago Mercantile Exchange [Member]
Capital Unit
Future contract held | contract														517
Futures Contracts [Member] | London Metal Exchange [Member]
Capital Unit
Future contract held | contract														769
Futures Contracts [Member] | Commodity Exchange Inc [Member]
Capital Unit
Future contract held | contract														306
United States Commodity Index Fund
Capital Unit
Sponsor capital contribution													$ 1,000	$ 0		$ 0					$ 3,000
Capital contribution to trust series													$ 1,000
Units acquisition | shares					40		20				5		20
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									$ 50.00					$ 40.96	$ 40.46	$ 32.58	$ 29.73	$ 26.64	$ 36.87
Number of units issued | shares									100,000
Value of unit issued									$ 5,000,000
Number of registered units									100,000
United States Agriculture Index Fund
Capital Unit
Units acquisition | shares			40	40
Number of initially registered units on Form S-1 with the U.S. Securities and Exchange Commission								20,000,000
Number of shares purchased | shares		5
United States Copper Index Fund
Capital Unit
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				$ 25.03	$ 26.30	$ 21.72	$ 18.77	$ 16.99	$ 17.54
Number of units issued | shares						40				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										$ 1,000											$ 1,000
Number of shares purchased | shares					40
USCF Canadian Crude Oil Index Fund
Capital Unit
Sponsor capital contribution																				$ 1,000
USCF Crescent Crypto Index Fund
Capital Unit
Sponsor capital contribution	$ 1,000
Units acquisition | shares	20