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CONTRACTS AND AGREEMENTS - Brokerage and Futures Commissions Merchant Agreements (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Total commissions accrued to brokers	$ 3,199	$ 1,633	$ 1,231
Total commissions as annualized percentage of average total net assets	0.03%	0.03%	0.03%
Rebalancing Investments Transaction [Member]
Total commissions accrued to brokers	$ 2,250	$ 1,153	$ 1,084
Total commissions as annualized percentage of average total net assets	70.33%	70.61%	88.06%
Creation And Redemption Activity [Member]
Total commissions accrued to brokers	$ 949	$ 480	$ 147
Total commissions as annualized percentage of average total net assets	29.67%	29.39%	11.94%