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CONTRACTS AND AGREEMENTS - Brokerage Commissions (Details) - USD ($)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Brokerage commissions $ 277,795 $ 548,601 $ 101,742
Percentage Of Average Daily Net Assets 0.09% 0.19% 0.12%
Rebalancing Investments Transaction [Member]      
Brokerage commissions $ 262,518 $ 527,095 $ 99,885
Percentage Of Average Daily Net Assets 94.50% 96.08% 98.17%
Creation And Redemption Activity [Member]      
Brokerage commissions $ 15,277 $ 21,506 $ 1,857
Percentage Of Average Daily Net Assets 5.50% 3.92% 1.83%