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CONTRACTS AND AGREEMENTS - Brokerage Commissions (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Long Duration Contracts Assumptions By Product And Guarantee [Line Items]
Brokerage commissions	$ 7,974	$ 69,031	$ 15,806	$ 74,177
Brokerage commissions as a percentage of average daily net assets	0.02%	0.11%	0.02%	0.11%
Rebalancing Investments Transaction [Member]
Long Duration Contracts Assumptions By Product And Guarantee [Line Items]
Brokerage commissions			$ 10,913	$ 16,605
Brokerage commissions as a percentage of average daily net assets	69.04%	22.39%	69.04%	22.39%
Trades Necessitated By Creation And Redemption Activity [Member]
Long Duration Contracts Assumptions By Product And Guarantee [Line Items]
Brokerage commissions			$ 4,893	$ 57,572
Brokerage commissions as a percentage of average daily net assets	30.96%	77.61%	30.96%	77.61%

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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