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CONTRACTS AND AGREEMENTS - Brokerage Commissions (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Long Duration Contracts Assumptions By Product And Guarantee [Line Items]
Brokerage commissions	$ 6,442	$ 15,806	$ 22,248	$ 89,983
Brokerage commissions as a percentage of average daily net assets	0.02%	0.07%	0.02%	0.07%
Rebalancing Investments Transaction [Member]
Long Duration Contracts Assumptions By Product And Guarantee [Line Items]
Brokerage commissions			$ 14,868	$ 26,140
Brokerage commissions as a percentage of average daily net assets	66.83%	29.05%	66.83%	29.05%
Trades Necessitated By Creation And Redemption Activity [Member]
Long Duration Contracts Assumptions By Product And Guarantee [Line Items]
Brokerage commissions			$ 7,380	$ 63,843
Brokerage commissions as a percentage of average daily net assets	33.17%	70.95%	33.17%	70.95%

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.

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- Definition

Percentage of Average Daily Net Assets

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