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CONTRACTS AND AGREEMENTS (Details Textual) (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Annual Fee Payable For Transfer Agency Services |  |  | $ 20,000 |
Brokerage commissions | 6,739 | 8,739 | 23,029 | 25,880
Rebalancing Cost |  |  | 19,736 | 17,220
Creation and Redemption Activity Costs |  |  | 3,293 | 8,660
Percentage Of Average Daily Assets Net Total |  |  | 0.07% | 0.06%
Maximum [Member] |  |  |  |
Transaction fees per transaction |  |  | 15 |
Commission Per Round Turn |  |  | 15 |
Minimum [Member] |  |  |  |
Annual Fee Payable For Transfer Agency Services |  |  | 75,000 |
Transaction fees per transaction |  |  | 7 |
Commission Per Round Turn |  |  | 7 |
First $500 million of USBO's, USOF's, USNG's, US12OF's, UGA's, USDHO's, USSO's, US12NG's, USCI's, CPER's, USAG's and USMI's combined net asset [Member] |  |  |  |
Fee percentage |  |  | 0.06% |
First $500 million of USBO's, USOF's, USNG's, US12OF's, UGA's, USDHO's, USSO's, US12NG's, USCI's, CPER's, USAG's and USMI's combined net asset [Member] | Maximum [Member] |  |  |  |
Base amount for determining fee percentage | 500,000,000 |  | 500,000,000 |
USBO's, USOF's, USNG's, US12OF's, UGA's, USDHO's, USSO's, US12NG's, USCI's, CPER's USAG's and USMI's combined net assets greater than $500 million but less than $1 billion [Member] |  |  |  |
Fee percentage |  |  | 0.0465% |
USBO's, USOF's, USNG's, US12OF's, UGA's, USDHO's, USSO's, US12NG's, USCI's, CPER's USAG's and USMI's combined net assets greater than $500 million but less than $1 billion [Member] | Maximum [Member] |  |  |  |
Base amount for determining fee percentage | 1,000,000,000 |  | 1,000,000,000 |
USBO's, USOF's, USNG's, US12OF's, UGA's, USDHO's, USSO's, US12NG's, USCI's, CPER's USAG's and USMI's combined net assets greater than $500 million but less than $1 billion [Member] | Minimum [Member] |  |  |  |
Base amount for determining fee percentage | 500,000,000 |  | 500,000,000 |
USBO's, USOF's, USNG's, US12OF's, UGA's, USDHO's, USSO's, US12NG's, USCI's, CPER's, USAG's and USMI's combined net assets exceed $1 billion [Member] |  |  |  |
Fee percentage |  |  | 0.035% |
USBO's, USOF's, USNG's, US12OF's, UGA's, USDHO's, USSO's, US12NG's, USCI's, CPER's, USAG's and USMI's combined net assets exceed $1 billion [Member] | Minimum [Member] |  |  |  |
Base amount for determining fee percentage | 1,000,000,000 |  | 1,000,000,000 |
Marketing Agreement [Member] | US12NG's assets up to $3 billion [Member] |  |  |  |
Fee percentage |  |  | 0.06% |
Base amount for determining fee percentage | 3,000,000,000 |  | 3,000,000,000 |
Marketing Agreement [Member] | US12NG's assets in excess of $3 billion [Member] |  |  |  |
Fee percentage |  |  | 0.04% |
Base amount for determining fee percentage | $ 3,000,000,000 |  | $ 3,000,000,000 |

X
- Definition The annual fee payable for transfer agency services reported during the period. + References No definition available. + Details
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- Definition Represents the commissions round turn trade including exchange fees. + References No definition available. + Details
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- Definition The amount of commission accrued as a result of trades necessitated by creation and redemption activity. + References No definition available. + Details
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- Definition The amount attributable to commission accrued as a result of rebalancing costs during the reporting period. + References No definition available. + Details
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- Definition The amount of expense during the period for floor brokerage fees paid to other broker-dealers to execute trades on their behalf, stock exchange fees, order flow fees, and clearance fees. + References No definition available. + Details
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