ORGANIZATION AND BUSINESS (Additional Information) (Details) - $ / Unit
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Dec. 31, 2016 |
Nov. 15, 2011 |
Aug. 10, 2010 |
| United States Commodity Index Fund [Member] |
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| Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
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| Fee paid by Authorized Purchasers for each order placed to create one or more Creation Baskets or to redeem one or more baskets |
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1,000
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| United States Commodity Index Fund [Member] | Creation Baskets [Member] | Effective as of May 1, 2012 [Member] |
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| Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
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| Number of Units per basket |
50,000
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| United States Commodity Index Fund [Member] | Marketing Agent [Member] | Prior to May 1, 2012 [Member] |
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| Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
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| Number of Units per basket |
100,000
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| United States Commodity Index Fund [Member] | Redemption Baskets [Member] |
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| Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
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| 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] |
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|
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| Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
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|
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| Number of Units per basket |
350
|
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| United States Copper Index Fund [Member] |
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| Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
|
|
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| 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
|
|
|