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CONTRACTS AND AGREEMENTS (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Brokerage commissions	$ 132,707	$ 165,409	$ 114,922
Percentage Of Average Daily Net Assets	0.13%	0.15%	0.12%
Rebalancing Investments Transaction [Member]
Brokerage commissions	$ 127,847	$ 160,817	$ 107,744
Percentage Of Average Daily Net Assets	96.34%	97.22%	93.75%
Creation And Redemption Activity [Member]
Brokerage commissions	$ 4,860	$ 4,592	$ 7,178
Percentage Of Average Daily Net Assets	3.66%	2.78%	6.25%

X

- Definition

Percentage Of Average Daily Net Assets

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X

- 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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- Details

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