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CONTRACTS AND AGREEMENTS (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Brokerage commissions	$ 23,732	$ 29,924
Percentage Of Average Daily Net Assets	0.10%	0.11%
Rebalancing Investments Transaction [Member]
Brokerage commissions	$ 23,175	$ 29,790
Percentage Of Average Daily Net Assets	97.65%	99.55%
Creation And Redemption Activity [Member]
Brokerage commissions	$ 557	$ 134
Percentage Of Average Daily Net Assets	2.35%	0.45%

X

- Definition

Percentage Of Average Daily Net Assets

+ References

No definition available.

+ Details

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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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Balance Type:	debit
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X

- Details

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Namespace Prefix:
Data Type:	na
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Period Type:

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type: